Alright, let's work through 12478271 times 80288554 step by step
12478271 × 80288554 = 80288554 × (12478271)
+ 80288554 × 1 yielding 80288554
+ 80288554 × 70 yielding 5620198780
+ 80288554 × 200 producing 16057710800
+ 80288554 × 8000 that equals 642308432000
+ 80288554 × 70000 producing 5620198780000
+ 80288554 × 400000 that results in 32115421600000
+ 80288554 × 2000000 that equals 160577108000000
+ 80288554 × 10000000 resulting in 802885540000000

= 1001862335010134
