Cut off 6 meters from a piece of cloth, just cut off (2/5) of this piece of cloth, how many meters are left in this piece of cloth?
一段布剪去6米，正好剪去这段布的(2/5)，这段布还剩多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">6 / (2/5)</gadget>
<output>15</output>

<gadget id="calculator">15 - 6</gadget>
<output>9</output>

<result>9</result>