Nicolas Lespour (Nico71) shows off his mechanical LEGO Technic calculator. A mechanical calculator, which is capable to add and substract, featured carry mechanism, keyboard, overflow mechanism and openable part for set up. Subscribe to Nico71 on YouTube: https://goo.gl/X98mR4
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Intro music: "Arc North X Rival - Short Story" https://youtu.be/PNPStdbhNzE
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