Question

What are the letters

Answer 1

E = 7
F = 8
G = 1

First find a number that multiplies by 4 to make a number ending in 2. The options are either 3 or 8.
Try the full multiplication with both 3 and 8 and see which one works. 
Using 3 works up until you try and work out E as E would have to be a two digit number for it to work so therefore the answer to F must be 8. 

Hope this helped.  

Answer 2

764x8=6112

Hope this helps :)