Let's calculate 80720396 x 96721056
80720396 × 96721056 = 96721056 × (80720396)
+ 96721056 × 6 giving us 580326336
+ 96721056 × 90 producing 8704895040
+ 96721056 × 300 which equals 29016316800
+ 96721056 × 0000 that is equal 0
+ 96721056 × 20000 resulting in 1934421120000
+ 96721056 × 700000 which equals 67704739200000
+ 96721056 × 0000000 which equals 0
+ 96721056 × 80000000 producing 7737684480000000

= 7807361941858176
