Let's calculate 1679 x 6639
1679 × 6639 = 6639 × (1679)
+ 6639 × 9 that is equal 59751
+ 6639 × 70 that is equal 464730
+ 6639 × 600 that results in 3983400
+ 6639 × 1000 which equals 6639000

= 11146881
