Alright, let's work through 9100 times 7750 step by step
9100 × 7750 = 7750 × (9100)
+ 7750 × 0 producing 0
+ 7750 × 00 that equals 0
+ 7750 × 100 yielding 775000
+ 7750 × 9000 that results in 69750000

= 70525000
