Alright, let's work through 9136 times 7920 step by step
9136 × 7920 = 7920 × (9136)
+ 7920 × 6 which equals 47520
+ 7920 × 30 resulting in 237600
+ 7920 × 100 that results in 792000
+ 7920 × 9000 which equals 71280000

= 72357120
