No problem, we've got 1381 and 3993 to multiply
1381 × 3993 = 3993 × (1381)
+ 3993 × 1 that equals 3993
+ 3993 × 80 that is equal 319440
+ 3993 × 300 yielding 1197900
+ 3993 × 1000 resulting in 3993000

= 5514333
