A wire is 5 meters long, cut off the full length (1/5) for the first time, and cut the rest (1/4) for the second time. How many meters is left on this wire?
一根电线长5米，第一次剪下全长的(1/5)，第二次剪下剩下的(1/4)．这根电线还剩下多少米？
<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">5 * (4/5)</gadget>
<output>4</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 * (3/4)</gadget>
<output>3</output>

<result>3</result>