Alright, let's work through 72729393 times 64867124 step by step
72729393 × 64867124 = 64867124 × (72729393)
+ 64867124 × 3 what gives us 194601372
+ 64867124 × 90 that is equal 5838041160
+ 64867124 × 300 giving us 19460137200
+ 64867124 × 9000 yielding 583804116000
+ 64867124 × 20000 that equals 1297342480000
+ 64867124 × 700000 that equals 45406986800000
+ 64867124 × 2000000 what gives us 129734248000000
+ 64867124 × 70000000 that results in 4540698680000000

= 4717746554175732
