Alright, let's work through 80442067 times 65297915 step by step
80442067 × 65297915 = 65297915 × (80442067)
+ 65297915 × 7 which equals 457085405
+ 65297915 × 60 resulting in 3917874900
+ 65297915 × 000 that results in 0
+ 65297915 × 2000 what gives us 130595830000
+ 65297915 × 40000 what gives us 2611916600000
+ 65297915 × 400000 resulting in 26119166000000
+ 65297915 × 0000000 what gives us 0
+ 65297915 × 80000000 what gives us 5223833200000000

= 5252699253390305
