No problem, we've got 1620 and 1672 to multiply
1620 × 1672 = 1672 × (1620)
+ 1672 × 0 yielding 0
+ 1672 × 20 resulting in 33440
+ 1672 × 600 giving us 1003200
+ 1672 × 1000 yielding 1672000

= 2708640
