If the former term of 5:8 is increased by 10, what should be the latter term to keep the ratio constant.
如果5：8的前项增加10，要使比值不变，后项应多少．
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<result>16</result>