Ok so,
Let's put the numbers where they're supposed to go
8( 7 * 5 + 7 * 4 + 7 )
Now, let's do everything in the parenthesis,
7 * 5 = 35
7 * 4 = 28
28 + 35 = 63 + 7 = 70
Next, we have to multiply it by 8 to get our final answer
70 * 8 = 560
Answer; 560
Hope this helps!