No problem, we've got 6387 and 6810 to multiply
6387 × 6810 = 6810 × (6387)
+ 6810 × 7 which equals 47670
+ 6810 × 80 that equals 544800
+ 6810 × 300 resulting in 2043000
+ 6810 × 6000 that results in 40860000

= 43495470
