Let's calculate 6642 x 9687
6642 × 9687 = 9687 × (6642)
+ 9687 × 2 that results in 19374
+ 9687 × 40 that results in 387480
+ 9687 × 600 that equals 5812200
+ 9687 × 6000 yielding 58122000

= 64341054
