Numeral System Calculator

A very simple and usable calculator.
The first line contains the base of the number system (2-20). The second and the third are the numbers we want to calculate. You have to choose the operation you want to apply. Then tap the pink icon at the bottom of the srceen.
To convert a number, you have to enter the number and the base of the system, then the base of the number you want to convert into. Then click on the pink icon in the right corner to get the result at the top of the screen