Alright, let's work through 80470821 times 19108533 step by step
80470821 × 19108533 = 19108533 × (80470821)
+ 19108533 × 1 that results in 19108533
+ 19108533 × 20 what gives us 382170660
+ 19108533 × 800 producing 15286826400
+ 19108533 × 0000 that is equal 0
+ 19108533 × 70000 resulting in 1337597310000
+ 19108533 × 400000 giving us 7643413200000
+ 19108533 × 0000000 that is equal 0
+ 19108533 × 80000000 that is equal 1528682640000000

= 1537679338615593
