Fold a piece of rectangular paper in half twice in a row, and then unfold it. What is the size of each piece of paper?
把一张长方形纸连续对折2次，再展开，每份是这张纸的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>