Alright, let's work through 4001 times 9874 step by step
4001 × 9874 = 9874 × (4001)
+ 9874 × 1 which equals 9874
+ 9874 × 00 giving us 0
+ 9874 × 000 what gives us 0
+ 9874 × 4000 what gives us 39496000

= 39505874
