We're going to solve 8578 multiplied by 8509
8578 × 8509 = 8509 × (8578)
+ 8509 × 8 that equals 68072
+ 8509 × 70 which equals 595630
+ 8509 × 500 yielding 4254500
+ 8509 × 8000 resulting in 68072000

= 72990202
