No problem, we've got 2857 and 6640 to multiply
2857 × 6640 = 6640 × (2857)
+ 6640 × 7 giving us 46480
+ 6640 × 50 giving us 332000
+ 6640 × 800 giving us 5312000
+ 6640 × 2000 yielding 13280000

= 18970480
