Alright, let's work through 6639 times 1565 step by step
6639 × 1565 = 1565 × (6639)
+ 1565 × 9 resulting in 14085
+ 1565 × 30 resulting in 46950
+ 1565 × 600 what gives us 939000
+ 1565 × 6000 which equals 9390000

= 10390035
