Let's calculate 3657 x 1107
3657 × 1107 = 1107 × (3657)
+ 1107 × 7 that is equal 7749
+ 1107 × 50 that results in 55350
+ 1107 × 600 that is equal 664200
+ 1107 × 3000 resulting in 3321000

= 4048299
