Alright, let's work through 8631 times 5305 step by step
8631 × 5305 = 5305 × (8631)
+ 5305 × 1 that results in 5305
+ 5305 × 30 which equals 159150
+ 5305 × 600 which equals 3183000
+ 5305 × 8000 yielding 42440000

= 45787455
