Using the four numbers a, 3, 8 and 12 as a ratio, what is the possible value of a
用a、3、8和12这四个数组成比例，a可能是多少
<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<gadget id="calculator">24 / 12</gadget>
<output>2</output>

<result>2</result>