Alright, let's work through 80870919 times 16488505 step by step
80870919 × 16488505 = 16488505 × (80870919)
+ 16488505 × 9 giving us 148396545
+ 16488505 × 10 what gives us 164885050
+ 16488505 × 900 producing 14839654500
+ 16488505 × 0000 that equals 0
+ 16488505 × 70000 that equals 1154195350000
+ 16488505 × 800000 giving us 13190804000000
+ 16488505 × 0000000 that is equal 0
+ 16488505 × 80000000 that equals 1319080400000000

= 1333440552286095
