rope is 1 meter long, cut off (3/5) meter, find the number of remaining meters, what is the formula
一根绳子长1米，剪去(3/5)米，求剩下的米数，列式是多少
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>