A rope is 1 meter long, cut off (1/5) meter for the first time, and cut off the remaining (1/4) for the second time, how many meters does the rope have at this time?
一根绳子长1米，第一次截去(1/5)米，第二次截去剩下的(1/4)，这时这根绳子还有多少米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(4/5) * (3/4)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>