Wrap a rope around the tree, fold the rope in half to measure 4 meters, and fold the rope in three to measure 10 meters. How long is the rope in meters?
用一根绳子绕树，将绳子五折量还余4米，将绳子三折量还余10米．绳子原长多少米？
<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

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

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

<gadget id="calculator">15 + 4</gadget>
<output>19</output>

<result>19</result>