There are two steel pipes of the same length, the first one takes 2 meters, and the second uses 3.8 meters. The remaining length of the first steel pipe is three times that of the second one. How many meters is each steel pipe?
有两根同样长的钢管，第一根用去2米，第二根用去3.8米，第一根钢管剩下的长度是第二根剩下的3倍，原来每根钢管多少米？
<gadget id="calculator">3.8 - 2</gadget>
<output>1.8</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">1.8 / 2</gadget>
<output>0.9</output>

<gadget id="calculator">0.9 + 3.8</gadget>
<output>4.7</output>

<result>4.7</result>