Alright, let's work through 6660 times 6372 step by step
6660 × 6372 = 6372 × (6660)
+ 6372 × 0 giving us 0
+ 6372 × 60 producing 382320
+ 6372 × 600 giving us 3823200
+ 6372 × 6000 yielding 38232000

= 42437520
