No problem, we've got 1576 and 6840 to multiply
1576 × 6840 = 6840 × (1576)
+ 6840 × 6 producing 41040
+ 6840 × 70 that is equal 478800
+ 6840 × 500 that is equal 3420000
+ 6840 × 1000 which equals 6840000

= 10779840
