Easiest for me to convert to base 10 and convert back to base 2
1(2)^4 +0(2)^3 + 1(2)^2 + 1 * 2 + 0 = 16 + 4 + 2 = 22
1(2)^4 + 0(2)^3 + 1(2)^2 = 16 + 4 = 20
1(2) = 2
So
22 * 20 / 2 =
220 base 10 convert to base 2
220 / 2 = 110 R 0
110 / 2 = 55 R 0
55 / 2 = 27 R 1
27/ 2 = 13 R 1
13 / 2 = 6 R 1
6 / 2 = 3 R 0
3 / 2 = 1 R 1
1 / 2 = 0 R 1
Read the remainders from the bottom to the top =
110111002