https://decimal-to-binary.com/multiplication-column.html?id=36

Multiply 11001 on 101001 = 1111112001 Column

Enter two numbers: the first multiplier and the second multiplier.
multiply by
x11001
101001
+11001
00000
00000
11001
00000
11001
1111112001
answer:11001×101001 = 1111112001