I don’t know the length of a piece of wood. I measure it with a rope. The length of the rope is 1.6 meters. If I fold the rope in half and measure it again, the rope is 0.6 meters shorter. How long is this wood in meters?
一根木头，不知它的长度，用一根绳子来量，绳子多1.6米，如果将绳子对折后再来量，绳子又短0.6米，这根木头长多少米？
<gadget id="calculator">1.6 + 0.6</gadget>
<output>2.2</output>

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

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

<gadget id="calculator">2.2 / (1/2)</gadget>
<output>4.4</output>

<gadget id="calculator">4.4 - 1.6</gadget>
<output>2.8</output>

<result>2.8</result>