Aaron will jog from home at x miles per hour and then walk back home by the same route at y miles per hour. How many miles from home can Aaron jog so that he spends a total of t hours jogging and walking?

Can someone show me how to solve it by plugging in numbers?
Of course I was able to plug the numbers in, however I am having trouble figuring out the formula and the target number.

Please don't forget to post the answer choices! I don't know whether the answers contain real numbers (in which case I would plug those in) or variables (in which case I can pick my own numbers).