Jennifer wants to go to a museum. There is one 5 miles away from her home and one 15 miles away. If Jennifer goes to both museums on two separate days, how many miles total will she travel?
Jennifer's home is 5 miles away from the first museum, so the round trip back and forth is 5 miles there + 5 miles back = 
<gadget id="calculator">5+5</gadget>
<output>10</output>
10 miles altogether.
On another day Jennifer goes to a museum 15 miles away + 15 miles to return home = 
<gadget id="calculator">15+15</gadget>
<output>30</output>
30 miles total.
Combined, Jennifer travels 10 miles on the first day + 30 miles on the second day = 
<gadget id="calculator">10+30</gadget>
<output>40</output>
40 miles Jennifer travels total.

<result>40</result>