No problem, we've got 2430 and 1620 to multiply
2430 × 1620 = 1620 × (2430)
+ 1620 × 0 that is equal 0
+ 1620 × 30 producing 48600
+ 1620 × 400 that is equal 648000
+ 1620 × 2000 yielding 3240000

= 3936600
