Xiaohong has more stamps than Xiaohua (1/4). Xiaohong gives Xiaohua the number of his stamps, and the two have the same amount.
小红的邮票数比小华多(1/4)，小红拿出他的邮票数的多少给小华，两人一样多．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">4 * (5/4)</gadget>
<output>5</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">5 - (9/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 5</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>