No problem, we've got 4279 and 5002 to multiply
4279 × 5002 = 5002 × (4279)
+ 5002 × 9 that is equal 45018
+ 5002 × 70 what gives us 350140
+ 5002 × 200 yielding 1000400
+ 5002 × 4000 what gives us 20008000

= 21403558
