Alright, let's work through 80071877 times 49429603 step by step
80071877 × 49429603 = 49429603 × (80071877)
+ 49429603 × 7 resulting in 346007221
+ 49429603 × 70 resulting in 3460072210
+ 49429603 × 800 what gives us 39543682400
+ 49429603 × 1000 yielding 49429603000
+ 49429603 × 70000 that results in 3460072210000
+ 49429603 × 000000 that is equal 0
+ 49429603 × 0000000 giving us 0
+ 49429603 × 80000000 producing 3954368240000000

= 3957921091574831
