No problem, we've got 1840 and 6270 to multiply
1840 × 6270 = 6270 × (1840)
+ 6270 × 0 yielding 0
+ 6270 × 40 what gives us 250800
+ 6270 × 800 yielding 5016000
+ 6270 × 1000 that results in 6270000

= 11536800
