There is a steel wire, (1/5) of it is cut off for the first time, (1/5) meter is cut off for the second time, exactly 1 meter is cut off twice, how many meters is this steel wire originally?
有一个钢丝，第一次剪去它的(1/5)，第二次剪去(1/5)米，两次正好剪去1米，这个钢丝原来长多少米？
<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">(4/5) / (1/5)</gadget>
<output>4</output>

<result>4</result>