The former term of 8:5 is increased by 24, how much should the latter term be increased to keep the ratio constant.
8：5的前项增加24，要使比值不变，后项应增加多少．
<gadget id="calculator">8 + 24</gadget>
<output>32</output>

<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<result>15</result>