No problem, we've got 2813 and 6300 to multiply
2813 × 6300 = 6300 × (2813)
+ 6300 × 3 what gives us 18900
+ 6300 × 10 yielding 63000
+ 6300 × 800 resulting in 5040000
+ 6300 × 2000 giving us 12600000

= 17721900
