Xiaohua uses a rope to measure the length of the desk. If you fold it in two, the rope is 0.4 meters longer than the desk. If you fold it in three, the rope is 0.4 meters shorter than the desk. How long is the rope?
小华用一根绳子来测量课桌的长度，两折来量，绳子比课桌还长0.4米，三折来量，绳子比课桌短0.4米，绳子长多少米？
<gadget id="calculator">0.4 + 0.4</gadget>
<output>0.8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">0.8 / (1/6)</gadget>
<output>4.8</output>

<result>4.8</result>