No problem, we've got 1647 and 8310 to multiply
1647 × 8310 = 8310 × (1647)
+ 8310 × 7 producing 58170
+ 8310 × 40 giving us 332400
+ 8310 × 600 yielding 4986000
+ 8310 × 1000 what gives us 8310000

= 13686570
