The total thickness of the four Xinhua dictionaries is 1 decimeter, and the thickness of one book is ((())/(())) decimeters.
四本新华字典一共厚1分米，一本的厚度是((())/(()))分米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 * (1/4)</gadget>
<output>1/4 = around 0.25</output>

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