No problem, we've got 5139 and 421 to multiply
5139 × 421 = 421 × (5139)
+ 421 × 9 that results in 3789
+ 421 × 30 what gives us 12630
+ 421 × 100 that is equal 42100
+ 421 × 5000 resulting in 2105000

= 2163519
