Help!: route with a circuit and x*laps

hi guys, i am just wondering if it is possible to create a route with an circuit (like in a stadium). let say that the way to the stadium is 2miles away and then the route goes to the circuit on with one lap has a distance of 0,5miles. on the circuit i will run 5 to 10 laps, depending on the daily fitness and then the route goes back to the starting point. so after one training i will have the way to the circuit and the way back to the starting point with is 2+2miles. but then i would like to enter the number of laps have run so like the distance is = 2+2+x*0,5 is there a possiblity to do that? i hope you understand what i mean.

I've got a similar problem; multiple out and backs.  The system goes overland even though I've checked "Follow the roads".  I'm about ready to give this up as a good idea with lousy implementation.