Alright, let's work through 4520990 times 64008104 step by step
4520990 × 64008104 = 64008104 × (4520990)
+ 64008104 × 0 that equals 0
+ 64008104 × 90 yielding 5760729360
+ 64008104 × 900 yielding 57607293600
+ 64008104 × 0000 resulting in 0
+ 64008104 × 20000 resulting in 1280162080000
+ 64008104 × 500000 which equals 32004052000000
+ 64008104 × 4000000 producing 256032416000000

= 289379998102960
