Alright, let's work through 80500423 times 81492738 step by step
80500423 × 81492738 = 81492738 × (80500423)
+ 81492738 × 3 which equals 244478214
+ 81492738 × 20 yielding 1629854760
+ 81492738 × 400 producing 32597095200
+ 81492738 × 0000 that equals 0
+ 81492738 × 00000 resulting in 0
+ 81492738 × 500000 what gives us 40746369000000
+ 81492738 × 0000000 giving us 0
+ 81492738 × 80000000 that is equal 6519419040000000

= 6560199880428174
