No problem, we've got 1687 and 4340 to multiply
1687 × 4340 = 4340 × (1687)
+ 4340 × 7 that equals 30380
+ 4340 × 80 yielding 347200
+ 4340 × 600 producing 2604000
+ 4340 × 1000 yielding 4340000

= 7321580
