There are infinitely many possible answers.
Two examples are 1 * 64 and 100 * 0.64
4x16=64 that is the final answer
It is: 8 times 8 = 64
It is: 4 times 16 = 64
8 times 8 = 64
64 times 3.125 = 200
512.
nothing
5.33
1024
10.67
8. 8 squared = 64.
64 x 1.5625 = 100