Alright, let's work through 66750402 times 71508997 step by step
66750402 × 71508997 = 71508997 × (66750402)
+ 71508997 × 2 giving us 143017994
+ 71508997 × 00 what gives us 0
+ 71508997 × 400 resulting in 28603598800
+ 71508997 × 0000 resulting in 0
+ 71508997 × 50000 that equals 3575449850000
+ 71508997 × 700000 producing 50056297900000
+ 71508997 × 6000000 yielding 429053982000000
+ 71508997 × 60000000 that is equal 4290539820000000

= 4773254296366794
