In a race, there are eight runners. The first five runners finish the race in 8 hours, while the rest of the runners finish the race 2 hours later. Calculate the total time the eight runners took to finish the race.
The first five runners took a combined total of 5*8 = 
<gadget id="calculator">5*8</gadget>
<output>40</output>
40 hours to finish the race.
The number of runners who finished the race 2 hours later after the first five is 8-5 = 
<gadget id="calculator">8-5</gadget>
<output>3</output>
3.
The 3 runners who finished the race 2 hours later took a total of 8+2 =
<gadget id="calculator">8+2</gadget>
<output>10</output>
10 hours to run the race.
Together, the three runners who finished the race in 10 hours took a total of 10*3 = 
<gadget id="calculator">10*3</gadget>
<output>30</output>
30 hours.
All eight runners took 30+40 = 70 hours altogether to finish the race.

<result>70</result>