A plastic rope is 4.5 meters long, 40% of the total length is cut off for the first time, and (2/5) meters are cut off for the second time, how many meters are left in this plastic rope?
一条塑料绳长4.5米，第一次剪去全长的40%，第二次剪去(2/5)米，这条塑料绳还剩下多少米？
<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">4.5 * (3/5)</gadget>
<output>2.7</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2.7 - (2/5)</gadget>
<output>2.3</output>

<result>2.3</result>