Let's calculate 8138 x 2665
8138 × 2665 = 2665 × (8138)
+ 2665 × 8 what gives us 21320
+ 2665 × 30 what gives us 79950
+ 2665 × 100 what gives us 266500
+ 2665 × 8000 which equals 21320000

= 21687770
