After a water pipe intercepts 40% of it, there is still 2.4m left. If 45% of it is intercepted, how many meters are left?
一根水管截取它的40%后，还剩下2.4m，若截取它的45%，还剩下多少米？
<gadget id="calculator">40 / 100</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">2.4 / (3/5)</gadget>
<output>4</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (9/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">4 * (11/20)</gadget>
<output>11/5 = around 2.2</output>

<result>11/5 = around 2.2</result>