Alright, let's work through 80151703 times 49964923 step by step
80151703 × 49964923 = 49964923 × (80151703)
+ 49964923 × 3 producing 149894769
+ 49964923 × 00 producing 0
+ 49964923 × 700 that is equal 34975446100
+ 49964923 × 1000 giving us 49964923000
+ 49964923 × 50000 that is equal 2498246150000
+ 49964923 × 100000 that is equal 4996492300000
+ 49964923 × 0000000 which equals 0
+ 49964923 × 80000000 producing 3997193840000000

= 4004773668713869
