Alright, let's work through 41777071 times 20200399 step by step
41777071 × 20200399 = 20200399 × (41777071)
+ 20200399 × 1 which equals 20200399
+ 20200399 × 70 resulting in 1414027930
+ 20200399 × 000 that equals 0
+ 20200399 × 7000 yielding 141402793000
+ 20200399 × 70000 resulting in 1414027930000
+ 20200399 × 700000 that equals 14140279300000
+ 20200399 × 1000000 resulting in 20200399000000
+ 20200399 × 40000000 what gives us 808015960000000

= 843913503251329
