Alright, let's work through 64713378 times 66739524 step by step
64713378 × 66739524 = 66739524 × (64713378)
+ 66739524 × 8 which equals 533916192
+ 66739524 × 70 producing 4671766680
+ 66739524 × 300 which equals 20021857200
+ 66739524 × 3000 yielding 200218572000
+ 66739524 × 10000 which equals 667395240000
+ 66739524 × 700000 producing 46717666800000
+ 66739524 × 4000000 that equals 266958096000000
+ 66739524 × 60000000 what gives us 4004371440000000

= 4318940044152072
