Alright, let's work through 81837141 times 41215024 step by step
81837141 × 41215024 = 41215024 × (81837141)
+ 41215024 × 1 that is equal 41215024
+ 41215024 × 40 resulting in 1648600960
+ 41215024 × 100 that equals 4121502400
+ 41215024 × 7000 giving us 288505168000
+ 41215024 × 30000 which equals 1236450720000
+ 41215024 × 800000 yielding 32972019200000
+ 41215024 × 1000000 which equals 41215024000000
+ 41215024 × 80000000 that equals 3297201920000000

= 3372919730406384
