Divide by Zero on the Friden STW10 Mechanical Calculator
Dividing by zero on a Friden mechanical calculator

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Please, try a divide by zero! Pleeeeeease! What would happen? What if Katherine Johnson did that in the movie Hidden Figures (this is the Friden that sits on her desk)? Would it catch fire? Would the rocket trajectory go to infinity? Now you are finally going to find out. Stick to the end for a little extra, a scene from another great movie that stars the Friden. This is a Friden STW 10 from 1956. See the full demo video at: https://youtu.be/qKm9eM2BuM0 And the restoration video to peek at the inside: https://youtu.be/1X3ivZfSfW4


Gabriel Drake : So the inventors added an extra Anti-Idiot-Button. Clever XD

Chris Quick : Teacher, "You are allowed a basic 4 function calculator for this exam." *Walks in with this.

TheDavo10001 : "made specially for idiots making YouTube videos" LOL

Joe Average : What a beautiful machine. I love its noise.

SolApathy : The Div /0 command allows you to oil the mechanicals and then you can cancel the command once oiling is complete.

Joe Duke : If you let it run for millions of years, it'll come up with ...42

Haze Anderson : 355 / 113 = PIE? And this whole time I have been using an oven ...

Richard Ball : That's incredible that they foresaw the whole information revolution and popularity of youtube etc.

gokartbuyer : Is it me or does anyone else find this incredibly satisfying to listen to?

Kurt Rozentaun : You have a strange piano

Shop Dog : It's even idiot proof

Brendan Downes : This would make a sick drum track for a black metal song.

Joshua Rehaluk : When I divide by zero I have to put on protective gloves first

Denise Thasder : A wonder of technology, even in this day

Matt Siegel : haha, great! :D excellent stupidity-to-entertainment ratio ;)

scowell : Grandpa had one of these at the company... he could get it to play a drum cadence... some certain numbers, not sure if div or mult, played a nice cadence! Enjoyed the video, thanks for posting!

Jay Glenn : Because Division by 0 approaches infinity. What a beautiful mechanical way of expressing that. Note: dividing by 0 does not =infinity because infinity is not a number. Dividing by 0 _approaches_ infinity. If this was not so all math would be broken.

hifijohn : now people know when electronic calculators came out in the early 70's they were considered so amazing.

Martiddy - Sama : It would have been hilarious if you have edited the video with the calculator catching on fire after dividing 😁

johnclawed : I'd like to take that with me to take a test.

Clone36 : I always lose my calculator at work, I need one of these.

Louis Poche' : when I was a little kid my father had one in his office.. I would push all the 9s then multiply and then all the 9s again... how long would that take to complete???? and was there a way to stop it????

Mandolinic : I remember using a hand cranked Ohdner machine at school some 45 years ago. Division was exactly the process your machine went through, except all movements had to be done by hand.  I nearly broke my wrist when I tried dividing by zero.

AlainHubert : Hello Marc. I have a small challenge for you: can you find out what numbers Jack Lemmon entered on the Friden to get that exact drum beat, when the carriage moves to the left 1, 2, 1-2-3, 1, 2, 1-2-3 spaces ? Being a drummer, I'm curious what those numbers were... The Friden could make a primitive "programmable" mechanical drum machine ! lol

Wurm : In slowmo it sounds like ambiance from a Silent Hill game

auri : hon hon hon, poisson, calculatrice!

Justin Duijn : Now; Let it loop outside Without stopping.

sirMAXX : *machine implodes and creates a black hole* That is a beautiful machine, btw. The engineering that must have taken to build that is undoubtedly staggering. I know even micro processors are still machines with moving parts, but with this bulky, heavy machine, it's much more satisfying to watch.

-tan s : I kept saying "you're gonna break it you're gonna break it" but you had an emergency stop dont do that you scared me

DESCENT : dang! would love to use one in schools today, just to get everybodys nerves wrecked haha

Ruby : 0 divided by 0 Calculator: *MINIGUN NOISE*

randomtronic : Great video mate! Love the clunking sounds!

TV_show : On todays episode of "stuff I dont understand is in my recommended, but I watch anyway"

BerkeleyGang : My father had one of these at work. I did this same experiment. I freaked out when the calculator started smoking. I don't remember what I did to make it stop. I was sure I was going to get in trouble.

Brendan : Divides by zero. *universe implodes

Alkyl Dimethyl Benzyl Ammonium Chloride : this machine would probably help with the US budget

Jarkii Studies : This proves X/0 = infinity lol

Just a Youtuber : That thing is a mix between a calculator and a machine gun

Jynn : 3:46 (slow heavy metal music starts playing)

Luck : My teather told us a story, that someone broke an arothmometer by dividing by zero. He told as that as a reason to read documentation first.

MrSandman127 : Div stop stops the machine in case of repeating decimals, pretty sure it's not solely to stop the division of zero.

jeena256 : This answer is maybe actually right. Everything divided by zero is maybe infinity. But your machine haven’t infinity symbol so it’s making infinite loop. :D

Benjamin Brady : What about 0 divided by 0?

Lawrence D’Oliveiro : 3:36 Only 2 out in the last place (3.14159265...)

Garga : infinite lüp! :D

Kirk Nelson : this thing is purely mechanical, like its just gears and cams and stuff?

Deepak Gaikwad : It's 6:05am, and I have no clue why I'm watching this!!

Zormac : The slow-mo sounds were amazing!

MrGoatflakes : Hmm, I must understand these machines somewhat better than I thought, because it behaved exactly as I thought it would. I figured it did division by something similar to this: 1. Repeatedly subtract the divisor from the dividend until it results in a change of sign in the accumulator, counting all the time 2. Adds the dividend back (once) to the accumulator and subtracts one from the count. The count will be the quotient and the the remaining number in the accumulator is the remainder. But if you use zero as the divisor, it will subtract zero, not changing the accumulator, so it will never become negative, so the division will go on indefinitely, eventually wrapping around the counter and never changing the accumulator either. Guess it works somewhat like I thought it would ;)