Let's calculate 1643 x 3769
1643 × 3769 = 3769 × (1643)
+ 3769 × 3 that is equal 11307
+ 3769 × 40 which equals 150760
+ 3769 × 600 that is equal 2261400
+ 3769 × 1000 resulting in 3769000

= 6192467
