Fold a square paper in half and divide it into 2 parts, each part is the size of this paper
把一张正方形纸对折后分成2份，每份是这张纸的多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>