It is a calculator that can be called many times by putting the formula and numbers in the memory button. For example,when the number to display in percent, After the formula is stored "×0.01=", If you press the button that has been stored after you enter a number, You can quickly calculate the percent display. The stored memory will continue remain,You can quickly calculate any number of times. You can see the calculation history by flick from the right end. In addition, you can also copy th