Function: Arithmetic subtraction of large integers. The unique application of its kind.
▸ More 20000 of the significant digits (The length of digits in each number, or, in other words the number of positions in number).
Limitations: Only the free current memory in the device.
1) refresh (clear all);
2) hide the keyboard and copy the result to paste anywhere;
3) send the result by e-mail;
4) start the subtraction.