No problem, we've got 1668 and 6250 to multiply
1668 × 6250 = 6250 × (1668)
+ 6250 × 8 yielding 50000
+ 6250 × 60 that equals 375000
+ 6250 × 600 resulting in 3750000
+ 6250 × 1000 producing 6250000

= 10425000
