A ratio is 7:10. If the former term of the ratio is increased by 35, how much should the latter term be increased to keep the ratio constant.
一个比是7：10，如果比的前项增加35，要使比值不变，比的后项应增加多少．
<gadget id="calculator">7 + 35</gadget>
<output>42</output>

<gadget id="calculator">42 / 7</gadget>
<output>6</output>

<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<gadget id="calculator">60 - 10</gadget>
<output>50</output>

<result>50</result>