Alright, let's work through 8899 times 8686 step by step
8899 × 8686 = 8686 × (8899)
+ 8686 × 9 that equals 78174
+ 8686 × 90 that equals 781740
+ 8686 × 800 that results in 6948800
+ 8686 × 8000 that is equal 69488000

= 77296714
