Alright, let's work through 8900 times 8145 step by step
8900 × 8145 = 8145 × (8900)
+ 8145 × 0 that equals 0
+ 8145 × 00 yielding 0
+ 8145 × 900 yielding 7330500
+ 8145 × 8000 that is equal 65160000

= 72490500
