Alright, let's work through 8153 times 3107 step by step
8153 × 3107 = 3107 × (8153)
+ 3107 × 3 producing 9321
+ 3107 × 50 that results in 155350
+ 3107 × 100 what gives us 310700
+ 3107 × 8000 yielding 24856000

= 25331371
