No problem, we've got 3820 and 1684 to multiply
3820 × 1684 = 1684 × (3820)
+ 1684 × 0 what gives us 0
+ 1684 × 20 yielding 33680
+ 1684 × 800 that results in 1347200
+ 1684 × 3000 that is equal 5052000

= 6432880
