https://binary2hex.com/allsystem.html?id=7080

Multiply 111011(2) on 1111(2) = 1101110101 Column

Enter two numbers and specify their base of the number system:
x111011
1111
+111011
111011
111011
111011
1101110101
the Final answer: 1110112 * 11112 = 11011101012