https://mathweb.ru/allsystem.html?id=123747

Сложить 0000000000000000000000000000000000000000000000020000000000000000(16) и 0000000000000000000000000000000000000000000000020000000000000000(16) = 40000000000000000 Столбиком

Введите два числа и укажите их основание системы счиления:
+0000000000000000000000000000000000000000000000020000000000000000
0000000000000000000000000000000000000000000000020000000000000000
0000000000000000000000000000000000000000000000040000000000000000
Ответ: 000000000000000000000000000000000000000000000002000000000000000016 + 000000000000000000000000000000000000000000000002000000000000000016 = 4000000000000000016