A rope is wrapped around the trunk of a big tree. If it is wound 10 times, 5 meters will be missing. If it is wound 8 times, 1 meter will be left. If it is wound 5 times, how many meters will be left on the rope?
一根绳子围着大树的树干，如果绕10圈缺5米，如果绕8圈剩1米，如果绕5圈，绳子还剩下多少米．
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 - 5</gadget>
<output>25</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">25 - 15</gadget>
<output>10</output>

<result>10</result>