Alright, let's work through 5121 times 7983 step by step
5121 × 7983 = 7983 × (5121)
+ 7983 × 1 yielding 7983
+ 7983 × 20 what gives us 159660
+ 7983 × 100 what gives us 798300
+ 7983 × 5000 giving us 39915000

= 40880943
