Alright, let's work through 20520471 times 23243984 step by step
20520471 × 23243984 = 23243984 × (20520471)
+ 23243984 × 1 that is equal 23243984
+ 23243984 × 70 resulting in 1627078880
+ 23243984 × 400 what gives us 9297593600
+ 23243984 × 0000 that equals 0
+ 23243984 × 20000 producing 464879680000
+ 23243984 × 500000 that is equal 11621992000000
+ 23243984 × 0000000 which equals 0
+ 23243984 × 20000000 what gives us 464879680000000

= 476977499596464
