Alright, let's work through 80323386 times 16056280 step by step
80323386 × 16056280 = 16056280 × (80323386)
+ 16056280 × 6 producing 96337680
+ 16056280 × 80 that equals 1284502400
+ 16056280 × 300 which equals 4816884000
+ 16056280 × 3000 resulting in 48168840000
+ 16056280 × 20000 that equals 321125600000
+ 16056280 × 300000 yielding 4816884000000
+ 16056280 × 0000000 producing 0
+ 16056280 × 80000000 that equals 1284502400000000

= 1289694776164080
