Alright, let's work through 80100862 times 70293512 step by step
80100862 × 70293512 = 70293512 × (80100862)
+ 70293512 × 2 giving us 140587024
+ 70293512 × 60 that is equal 4217610720
+ 70293512 × 800 that equals 56234809600
+ 70293512 × 0000 that is equal 0
+ 70293512 × 00000 yielding 0
+ 70293512 × 100000 resulting in 7029351200000
+ 70293512 × 0000000 that results in 0
+ 70293512 × 80000000 producing 5623480960000000

= 5630570904207344
