Let's calculate 3690 x 3728
3690 × 3728 = 3728 × (3690)
+ 3728 × 0 what gives us 0
+ 3728 × 90 that results in 335520
+ 3728 × 600 giving us 2236800
+ 3728 × 3000 that results in 11184000

= 13756320
