Alright, let's work through 81406331 times 41242768 step by step
81406331 × 41242768 = 41242768 × (81406331)
+ 41242768 × 1 which equals 41242768
+ 41242768 × 30 resulting in 1237283040
+ 41242768 × 300 that results in 12372830400
+ 41242768 × 6000 that equals 247456608000
+ 41242768 × 00000 that equals 0
+ 41242768 × 400000 that results in 16497107200000
+ 41242768 × 1000000 that results in 41242768000000
+ 41242768 × 80000000 that is equal 3299421440000000

= 3357422423164208
