Alright, let's work through 88513479 times 78789336 step by step
88513479 × 78789336 = 78789336 × (88513479)
+ 78789336 × 9 giving us 709104024
+ 78789336 × 70 that equals 5515253520
+ 78789336 × 400 producing 31515734400
+ 78789336 × 3000 that is equal 236368008000
+ 78789336 × 10000 that results in 787893360000
+ 78789336 × 500000 what gives us 39394668000000
+ 78789336 × 8000000 resulting in 630314688000000
+ 78789336 × 80000000 resulting in 6303146880000000

= 6973918237459944
