Alright, let's work through 80702138 times 42499082 step by step
80702138 × 42499082 = 42499082 × (80702138)
+ 42499082 × 8 that equals 339992656
+ 42499082 × 30 what gives us 1274972460
+ 42499082 × 100 yielding 4249908200
+ 42499082 × 2000 yielding 84998164000
+ 42499082 × 00000 producing 0
+ 42499082 × 700000 giving us 29749357400000
+ 42499082 × 0000000 which equals 0
+ 42499082 × 80000000 that is equal 3399926560000000

= 3429766780437316
