https://mathweb.ru/allsystem.html?id=125501

Умножить 1000000.00111000010100011110101(2) на 1101000001.1(2) = 1101000100010111.0101111010110011010111110000000000000000000000 Столбиком

Введите два числа и укажите их основание системы счиления:
x1000000.00111000010100011110101
1101000001.10000000000000000000000
+000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
100000000111000010100011110101
100000000111000010100011110101
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
000000000000000000000000000000
100000000111000010100011110101
000000000000000000000000000000
100000000111000010100011110101
100000000111000010100011110101
1101000100010111.0101111010110011010111110000000000000000000000
Ответ: 1000000.001110000101000111101012 * 1101000001.12 = 1101000100010111.01011110101100110101111100000000000000000000002