A young man who calls himself MaxSGB built a calculator in Minecraft. But this is not just any mechanical calculator: it’s entirely “mechanical” and, if it were real, would be 5 million cubic meters in size.

The calculator supports “6 digit addition and subtraction, 3 digit multiplication, division and trigonometric/scientific functions.” He reduced the number of multiplication and division digits because it took too long to perform the calculations using pixelated blocks.

The video, above, is pretty freaking long, but it’s important to note that not all kids out there are listening to the rockity rap and smoking tea. Some are making calculators in imaginary worlds.