No problem, we've got 2640 and 3152 to multiply
2640 × 3152 = 3152 × (2640)
+ 3152 × 0 that is equal 0
+ 3152 × 40 what gives us 126080
+ 3152 × 600 that is equal 1891200
+ 3152 × 2000 what gives us 6304000

= 8321280
