Alright, let's work through 66344357 times 72747371 step by step
66344357 × 72747371 = 72747371 × (66344357)
+ 72747371 × 7 that is equal 509231597
+ 72747371 × 50 giving us 3637368550
+ 72747371 × 300 which equals 21824211300
+ 72747371 × 4000 that is equal 290989484000
+ 72747371 × 40000 that equals 2909894840000
+ 72747371 × 300000 resulting in 21824211300000
+ 72747371 × 6000000 that is equal 436484226000000
+ 72747371 × 60000000 yielding 4364842260000000

= 4826377552435447
