Alright, let's work through 9157 times 8251 step by step
9157 × 8251 = 8251 × (9157)
+ 8251 × 7 that equals 57757
+ 8251 × 50 which equals 412550
+ 8251 × 100 that equals 825100
+ 8251 × 9000 giving us 74259000

= 75554407
