A 1-meter-long steel bar, cut off (2/5) meters for the first time, and cut off (1/3) meters for the second time, how many meters are left?
1米长的钢条，第一次截去(2/5)米，第二次截去(1/3)米，还剩多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (2/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>