Alright, let's work through 80151540 times 31208819 step by step
80151540 × 31208819 = 31208819 × (80151540)
+ 31208819 × 0 that equals 0
+ 31208819 × 40 that is equal 1248352760
+ 31208819 × 500 resulting in 15604409500
+ 31208819 × 1000 producing 31208819000
+ 31208819 × 50000 that equals 1560440950000
+ 31208819 × 100000 which equals 3120881900000
+ 31208819 × 0000000 what gives us 0
+ 31208819 × 80000000 giving us 2496705520000000

= 2501434904431260
