Alright, let's work through 20501704 times 87301899 step by step
20501704 × 87301899 = 87301899 × (20501704)
+ 87301899 × 4 what gives us 349207596
+ 87301899 × 00 resulting in 0
+ 87301899 × 700 that equals 61111329300
+ 87301899 × 1000 that results in 87301899000
+ 87301899 × 00000 what gives us 0
+ 87301899 × 500000 giving us 43650949500000
+ 87301899 × 0000000 resulting in 0
+ 87301899 × 20000000 producing 1746037980000000

= 1789837691935896
