Question 292733
It is hard to understand you. Please use punctuation.
8*3/2=24/2=12
Remember multiplication by the reciprocal is the same as division.
Every 2 hours he shows up 3 times.
2/3+2/3*2/3=6/3=2 hours with 3 visits
Contrary to what my esteemed colleague Edwin has to say about this problem there is no indication that the conductor comes in 13 times.
 
The problem clearly states that the conductor  only comes in after 40 minutes have passed. Thus he does not come in at the beginning of the trip.
So the answer is 12.