Jonathan enjoys walking and running for exercise, and he has three different exercise routines.  On Mondays, he walks at 2 miles per hour.  On Wednesdays, he walks at 3 miles per hour.  And on Fridays, he runs at 6 miles per hour.  On each exercise day, he travels 6 miles.  What is the combined total time, in hours, he spends exercising in a week?
On Mondays, he walks 6 miles at 2 miles per hour, for a length of 6/2=
<gadget id="calculator">6/2</gadget>
<output>3</output>
3 hours.
On Wednesdays, he walks 6 miles at 3 miles per hour, for a length of 6/3=
<gadget id="calculator">6/3</gadget>
<output>2</output>
2 hours.
And on Fridays, he runs 6 miles at 6 miles per hour, for a length of 6/6=
<gadget id="calculator">6/6</gadget>
<output>1</output>
1 hour.
The combined total time he spends exercising in a week is 3+2+1=
<gadget id="calculator">3+2+1</gadget>
<output>6</output>
6 hours.

<result>6</result>