Alright, let's work through 7998 times 2524 step by step
7998 × 2524 = 2524 × (7998)
+ 2524 × 8 what gives us 20192
+ 2524 × 90 producing 227160
+ 2524 × 900 yielding 2271600
+ 2524 × 7000 which equals 17668000

= 20186952
