Let's calculate 72297727 x 78382240
72297727 × 78382240 = 78382240 × (72297727)
+ 78382240 × 7 that results in 548675680
+ 78382240 × 20 that results in 1567644800
+ 78382240 × 700 resulting in 54867568000
+ 78382240 × 7000 that results in 548675680000
+ 78382240 × 90000 which equals 7054401600000
+ 78382240 × 200000 that results in 15676448000000
+ 78382240 × 2000000 which equals 156764480000000
+ 78382240 × 70000000 giving us 5486756800000000

= 5666857789168480
