Alright, let's work through 65497589 times 71471611 step by step
65497589 × 71471611 = 71471611 × (65497589)
+ 71471611 × 9 resulting in 643244499
+ 71471611 × 80 resulting in 5717728880
+ 71471611 × 500 which equals 35735805500
+ 71471611 × 7000 giving us 500301277000
+ 71471611 × 90000 which equals 6432444990000
+ 71471611 × 400000 yielding 28588644400000
+ 71471611 × 5000000 that results in 357358055000000
+ 71471611 × 60000000 giving us 4288296660000000

= 4681218202445879
