https://mathweb.ru/allsystem.html?id=124197

Умножить 100000000000000000000(3) на 10000000000000000000000(3) = 1000000000000000000000000000000000000000000 Столбиком

Введите два числа и укажите их основание системы счиления:
x100000000000000000000
10000000000000000000000
+000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
000000000000000000000
100000000000000000000
1000000000000000000000000000000000000000000
Ответ: 1000000000000000000003 * 100000000000000000000003 = 10000000000000000000000000000000000000000003