Alright, let's work through 81293941 times 71482299 step by step
81293941 × 71482299 = 71482299 × (81293941)
+ 71482299 × 1 what gives us 71482299
+ 71482299 × 40 producing 2859291960
+ 71482299 × 900 that results in 64334069100
+ 71482299 × 3000 giving us 214446897000
+ 71482299 × 90000 what gives us 6433406910000
+ 71482299 × 200000 that equals 14296459800000
+ 71482299 × 1000000 giving us 71482299000000
+ 71482299 × 80000000 giving us 5718583920000000

= 5811077797450359
