Let's calculate 6713 x 6639
6713 × 6639 = 6639 × (6713)
+ 6639 × 3 that equals 19917
+ 6639 × 10 what gives us 66390
+ 6639 × 700 what gives us 4647300
+ 6639 × 6000 what gives us 39834000

= 44567607
