Alright, let's work through 3987 times 9502 step by step
3987 × 9502 = 9502 × (3987)
+ 9502 × 7 what gives us 66514
+ 9502 × 80 yielding 760160
+ 9502 × 900 which equals 8551800
+ 9502 × 3000 that equals 28506000

= 37884474
