In a ratio, the former term is 7, and after the former term is increased by 28, what should be the latter term to keep the ratio constant.
一个比中，前项是7，前项增加28后，要使比值不变，后项应多少．
<gadget id="calculator">7 + 28</gadget>
<output>35</output>

<gadget id="calculator">35 / 7</gadget>
<output>5</output>

<result>5</result>