Press Start then choose the box with the math you want to do. The first number you put in is the number you would put in first into a real calculator and press enter or press the arrow on your screen. You would then put in the second number after you submit the first one and press enter or the arrow. The calculator will have a speech bubble with the answer. It will round to the nearest hundredth.
You can copy this project as long as you give me credit for the original one. I have made it to where you can also use exponents now. Feel free to test this with a real calculator and comment if you find any problems. Keep in mind that although this is not the nicest calculator on scratch and there are other calculators on Scratch mine does still work and I made this without any help. Keep on mind the calculator is incapable of finding your answer if there is a fraction in the exponent.