No problem, we've got 1620 and 2684 to multiply
1620 × 2684 = 2684 × (1620)
+ 2684 × 0 giving us 0
+ 2684 × 20 what gives us 53680
+ 2684 × 600 yielding 1610400
+ 2684 × 1000 giving us 2684000

= 4348080
