Alright, let's work through 81041963 times 70030164 step by step
81041963 × 70030164 = 70030164 × (81041963)
+ 70030164 × 3 what gives us 210090492
+ 70030164 × 60 yielding 4201809840
+ 70030164 × 900 producing 63027147600
+ 70030164 × 1000 giving us 70030164000
+ 70030164 × 40000 yielding 2801206560000
+ 70030164 × 000000 yielding 0
+ 70030164 × 1000000 which equals 70030164000000
+ 70030164 × 80000000 what gives us 5602413120000000

= 5675381959771932
