Alright, let's work through 7920 times 9315 step by step
7920 × 9315 = 9315 × (7920)
+ 9315 × 0 that results in 0
+ 9315 × 20 producing 186300
+ 9315 × 900 producing 8383500
+ 9315 × 7000 producing 65205000

= 73774800
