No problem, we've got 6641 and 8215 to multiply
6641 × 8215 = 8215 × (6641)
+ 8215 × 1 what gives us 8215
+ 8215 × 40 that equals 328600
+ 8215 × 600 yielding 4929000
+ 8215 × 6000 which equals 49290000

= 54555815
