Alright, let's work through 72651359 times 66290523 step by step
72651359 × 66290523 = 66290523 × (72651359)
+ 66290523 × 9 producing 596614707
+ 66290523 × 50 which equals 3314526150
+ 66290523 × 300 resulting in 19887156900
+ 66290523 × 1000 what gives us 66290523000
+ 66290523 × 50000 that equals 3314526150000
+ 66290523 × 600000 producing 39774313800000
+ 66290523 × 2000000 producing 132581046000000
+ 66290523 × 70000000 resulting in 4640336610000000

= 4816096584770757
