No problem, we've got 4051 and 1684 to multiply
4051 × 1684 = 1684 × (4051)
+ 1684 × 1 that is equal 1684
+ 1684 × 50 resulting in 84200
+ 1684 × 000 that equals 0
+ 1684 × 4000 resulting in 6736000

= 6821884
