Alright, let's work through 64220880 times 66064918 step by step
64220880 × 66064918 = 66064918 × (64220880)
+ 66064918 × 0 which equals 0
+ 66064918 × 80 producing 5285193440
+ 66064918 × 800 producing 52851934400
+ 66064918 × 0000 yielding 0
+ 66064918 × 20000 that is equal 1321298360000
+ 66064918 × 200000 what gives us 13212983600000
+ 66064918 × 4000000 resulting in 264259672000000
+ 66064918 × 60000000 that is equal 3963895080000000

= 4242747171087840
