The road construction team built a road. After repairing in the morning, the repaired part was unrepaired (3/7), and another 58 meters were repaired in the afternoon. At this time, the ratio of the repaired end to the unrepaired end is 5:2. How many meters are left unrepaired?
修路队修一条路，上午修后，已修的是未修的(3/7)，下午又修了58米，这时已修的末数和未修的末数的比是5：2，还剩多少米没有修？
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">3 + 7</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(5/7) - (3/10)</gadget>
<output>29/70 = around 0.414286</output>

<gadget id="calculator">58 / (29/70)</gadget>
<output>140</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">140 * (2/7)</gadget>
<output>40</output>

<result>40</result>