Minecraft wiki entry for Redstone_computers, associated text: A computer takes care of numbers less than one by form of float-point arithmetic, it is only so useful in larger-bit computers (16-64 bits) and computers which do need to use numbers less than one. Floating-point arithmetic or arbitrary-precision arithmetic are two ways to achieve this. Another simpler but less efficient way would be to assign all numbers a power of two so that they are 'bumped up' by the power of two chosen. The player must do this to every number and assume the one as one times the power of the two you have chosen. For example, 5 = 1012 so 5 × 23 = 1010002; five is bumped up by three. So now, one in your new system would be 1 × 23 = 10002 and that would leave room for 0.1, 0.01 or 0.001; 0.01 * 23 = 102. This leads to a more complicated setup for your computer.