51
17 x 17
*
because prime numbers have to be multiplyed by 1 and itself for example 17 it can only be multiplyed by 1 and itself.
66
24
672
3 multiplyed by 108 m
90
it means three minus nine by(multiplyed by) forty
37 and 3/8
1 x 57, 3 x 19.
It is: 1/3 times 6 = 2