Xiaojie is running on a straight runway, running the whole distance (1/4), and there is still 10 meters away from the midpoint of the runway. How many meters is the total length of this runway?
小杰在笔直的跑道上跑步，跑了全程的(1/4)，离跑道的中点还有10米，这条跑道全长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">10 / (1/4)</gadget>
<output>40</output>

<result>40</result>