The school built a small road, 35% of the total length has been built, and there is still 15 meters left from the midpoint. How many meters is this path?
学校修一条小路，已经修了全长的35%，离中点还剩15米．这条小路长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(1/2) - (7/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">15 / (3/20)</gadget>
<output>100</output>

<result>100</result>