Alright, let's work through 77745896 times 73299824 step by step
77745896 × 73299824 = 73299824 × (77745896)
+ 73299824 × 6 resulting in 439798944
+ 73299824 × 90 resulting in 6596984160
+ 73299824 × 800 that equals 58639859200
+ 73299824 × 5000 resulting in 366499120000
+ 73299824 × 40000 giving us 2931992960000
+ 73299824 × 700000 that equals 51309876800000
+ 73299824 × 7000000 giving us 513098768000000
+ 73299824 × 70000000 which equals 5130987680000000

= 5698760493522304
