Alright, let's work through 87905355 times 84943343 step by step
87905355 × 84943343 = 84943343 × (87905355)
+ 84943343 × 5 that is equal 424716715
+ 84943343 × 50 which equals 4247167150
+ 84943343 × 300 which equals 25483002900
+ 84943343 × 5000 that results in 424716715000
+ 84943343 × 00000 producing 0
+ 84943343 × 900000 giving us 76449008700000
+ 84943343 × 7000000 what gives us 594603401000000
+ 84943343 × 80000000 producing 6795467440000000

= 7466974721301765
