Alright, let's work through 3651 times 3487 step by step
3651 × 3487 = 3487 × (3651)
+ 3487 × 1 that equals 3487
+ 3487 × 50 that is equal 174350
+ 3487 × 600 that results in 2092200
+ 3487 × 3000 that results in 10461000

= 12731037
