Alright, let's work through 9120 times 9813 step by step
9120 × 9813 = 9813 × (9120)
+ 9813 × 0 giving us 0
+ 9813 × 20 that is equal 196260
+ 9813 × 100 which equals 981300
+ 9813 × 9000 giving us 88317000

= 89494560
