This calculator converts Decimal (1,2,3,4,5) to Binary (1,10,11,100,101). Type the number on the bottom that is greater than 0. This calculator can handle very large numbers greater than 0 because the place value chart (1=1, 2=10, 3=11, etc) is generated with math each time, until it is the correct size. The reason it can't do numbers too large is because scratch then treats those numbers as infinity. To start auto mode, click green flag, slide the mode slider to 0, then input the starting number, then click enter. To use manual mode, type a number then click enter. Do it as much as you want.