No problem, we've got 1329 and 6310 to multiply
1329 × 6310 = 6310 × (1329)
+ 6310 × 9 that is equal 56790
+ 6310 × 20 which equals 126200
+ 6310 × 300 yielding 1893000
+ 6310 × 1000 which equals 6310000

= 8385990
