No problem, we've got 1815 and 6297 to multiply
1815 × 6297 = 6297 × (1815)
+ 6297 × 5 what gives us 31485
+ 6297 × 10 that equals 62970
+ 6297 × 800 that results in 5037600
+ 6297 × 1000 that equals 6297000

= 11429055
