The total length of the three ropes is 220 meters. The second rope is three times as long as the first one, and the third rope is twice as long as the second one. How long is the first rope in meters?
三根绳子共长220米，第二根绳长是第一根的3倍，第三根绳长是第二根的2倍，第一根绳长多少米？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">1 + 3 + 6</gadget>
<output>10</output>

<gadget id="calculator">220 / 10</gadget>
<output>22</output>

<result>22</result>