Xiaoli bought two ribbons of the same length to weave by hand. The red ribbon used up 3.6 meters, and the yellow ribbon used 0.8 meters. It turned out that the remaining red ribbon was half of the yellow ribbon. How many meters is each ribbon?
小丽买来两根同样长的丝带编手工，红丝带用去3.6米，黄丝带用去了0.8米，结果发现剩下的红丝带是黄丝带的一半．每根丝带长多少米？
<gadget id="calculator">3.6 * 2</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 - 0.8</gadget>
<output>6.4</output>

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

<gadget id="calculator">6.4 / 1</gadget>
<output>6.4</output>

<result>6.4</result>