Alright, let's work through 80708479 times 49771578 step by step
80708479 × 49771578 = 49771578 × (80708479)
+ 49771578 × 9 that is equal 447944202
+ 49771578 × 70 that results in 3484010460
+ 49771578 × 400 that equals 19908631200
+ 49771578 × 8000 giving us 398172624000
+ 49771578 × 00000 producing 0
+ 49771578 × 700000 giving us 34840104600000
+ 49771578 × 0000000 that equals 0
+ 49771578 × 80000000 yielding 3981726240000000

= 4016988357809862
