Let's calculate 1615 x 2378
1615 × 2378 = 2378 × (1615)
+ 2378 × 5 that results in 11890
+ 2378 × 10 that is equal 23780
+ 2378 × 600 that results in 1426800
+ 2378 × 1000 yielding 2378000

= 3840470
