Alright, let's work through 3947 times 9587 step by step
3947 × 9587 = 9587 × (3947)
+ 9587 × 7 that equals 67109
+ 9587 × 40 that is equal 383480
+ 9587 × 900 that equals 8628300
+ 9587 × 3000 that is equal 28761000

= 37839889
