Alright, let's work through 3120 times 9099 step by step
3120 × 9099 = 9099 × (3120)
+ 9099 × 0 that equals 0
+ 9099 × 20 yielding 181980
+ 9099 × 100 giving us 909900
+ 9099 × 3000 that equals 27297000

= 28388880
