A rope is cut off (2/5), and there are 2 meters left. How long is this rope in meters?
一条绳子剪去(2/5)，还剩2米，这条绳子长多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / (3/5)</gadget>
<output>10/3 = around 3.333333</output>

<result>10/3 = around 3.333333</result>