Alright, let's work through 9120 times 960 step by step
9120 × 960 = 960 × (9120)
+ 960 × 0 producing 0
+ 960 × 20 that is equal 19200
+ 960 × 100 that is equal 96000
+ 960 × 9000 that equals 8640000

= 8755200
