Alright, let's work through 8157 times 4325 step by step
8157 × 4325 = 4325 × (8157)
+ 4325 × 7 that equals 30275
+ 4325 × 50 which equals 216250
+ 4325 × 100 that results in 432500
+ 4325 × 8000 resulting in 34600000

= 35279025
