Let's calculate 4138 x 4990
4138 × 4990 = 4990 × (4138)
+ 4990 × 8 that is equal 39920
+ 4990 × 30 that equals 149700
+ 4990 × 100 what gives us 499000
+ 4990 × 4000 which equals 19960000

= 20648620
