After 3.8 meters of a piece of wood have been used up, there is still 3.8 meters left. How many meters was the length of this piece of wood?
一根木料用去3.8米后，还剩下3.8米，这根木料原来长多少米？
<gadget id="calculator">3.8 + 3.8</gadget>
<output>7.6</output>

<result>7.6</result>