Alright, let's work through 80409177 times 49516613 step by step
80409177 × 49516613 = 49516613 × (80409177)
+ 49516613 × 7 what gives us 346616291
+ 49516613 × 70 resulting in 3466162910
+ 49516613 × 100 that is equal 4951661300
+ 49516613 × 9000 what gives us 445649517000
+ 49516613 × 00000 which equals 0
+ 49516613 × 400000 that is equal 19806645200000
+ 49516613 × 0000000 that results in 0
+ 49516613 × 80000000 producing 3961329040000000

= 3981590099157501
