Alright, let's work through 42181267 times 81399076 step by step
42181267 × 81399076 = 81399076 × (42181267)
+ 81399076 × 7 that results in 569793532
+ 81399076 × 60 giving us 4883944560
+ 81399076 × 200 resulting in 16279815200
+ 81399076 × 1000 that results in 81399076000
+ 81399076 × 80000 that results in 6511926080000
+ 81399076 × 100000 giving us 8139907600000
+ 81399076 × 2000000 resulting in 162798152000000
+ 81399076 × 40000000 giving us 3255963040000000

= 3433516158309292
