Alright, let's work through 66075984 times 67112477 step by step
66075984 × 67112477 = 67112477 × (66075984)
+ 67112477 × 4 that equals 268449908
+ 67112477 × 80 resulting in 5368998160
+ 67112477 × 900 that results in 60401229300
+ 67112477 × 5000 that results in 335562385000
+ 67112477 × 70000 yielding 4697873390000
+ 67112477 × 000000 yielding 0
+ 67112477 × 6000000 resulting in 402674862000000
+ 67112477 × 60000000 what gives us 4026748620000000

= 4434522956452368
