On Monday, Walt walked 4 miles. Tuesday, he walked 6 times as many miles as he walked on Monday. His total mileage Monday through Wednesday was 41 miles. How many miles did he walk on Wednesday?
Walt's Tuesday walk was 4*6 = 
<gadget id="calculator">4*6</gadget>
<output>24</output>
24 miles.
Walt's Monday and Tuesday walk were 4+24 = 
<gadget id="calculator">4+24</gadget>
<output>28</output>
28 miles combined.
Walt's Wednesday walk was 41-28 = 
<gadget id="calculator">41-28</gadget>
<output>13</output>
13 miles.

<result>13</result>