Alright, let's work through 8173 times 7997 step by step
8173 × 7997 = 7997 × (8173)
+ 7997 × 3 giving us 23991
+ 7997 × 70 that is equal 559790
+ 7997 × 100 which equals 799700
+ 7997 × 8000 producing 63976000

= 65359481
