No problem, we've got 6489 and 7992 to multiply
6489 × 7992 = 7992 × (6489)
+ 7992 × 9 yielding 71928
+ 7992 × 80 what gives us 639360
+ 7992 × 400 what gives us 3196800
+ 7992 × 6000 giving us 47952000

= 51860088
