Alright, let's work through 8414545 times 99957641 step by step
8414545 × 99957641 = 99957641 × (8414545)
+ 99957641 × 5 what gives us 499788205
+ 99957641 × 40 that is equal 3998305640
+ 99957641 × 500 what gives us 49978820500
+ 99957641 × 4000 which equals 399830564000
+ 99957641 × 10000 that is equal 999576410000
+ 99957641 × 400000 that results in 39983056400000
+ 99957641 × 8000000 producing 799661128000000

= 841098068288345
