Alright, let's work through 3187 times 4525 step by step
3187 × 4525 = 4525 × (3187)
+ 4525 × 7 resulting in 31675
+ 4525 × 80 resulting in 362000
+ 4525 × 100 producing 452500
+ 4525 × 3000 which equals 13575000

= 14421175
