Traveling from Manhattan to the Bronx, Andrew rides the subway for 10 hours, takes the train and rides for twice as much time as the subway ride, and then bikes the remaining distance for 8 hours. What's the total time he takes to reach the Bronx from Manhattan?
The train ride takes Andrew 2*10 = 
<gadget id="calculator">2*10</gadget>
<output>20</output>
20 hours.
Together, the subway ride and the train ride take Andrew 10+20 = 
<gadget id="calculator">10+20</gadget>
<output>30</output>
30 hours.
With an additional bike ride of 8 hours to reach the Bronx, Andrew takes 30+8 = 
<gadget id="calculator">30+8</gadget>
<output>38</output>
38 hours to travel from Manhattan to the Bronx.

<result>38</result>