Divide a square paper into 4 equal parts, one of which is equal to the whole paper.
把一张正方形纸平均分成4份，其中的1份是整张纸的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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