The length of a rectangle is 0.8 meters, and the width is (1/4) meters compared to the length. What is the width in meters?
一个长方形的长是0.8米，宽比长短(1/4)米，宽是多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">0.8 - (1/4)</gadget>
<output>0.55</output>

<result>0.55</result>