Subtract 12 continuously from 168, how many times, the result is 12.
从168里连续减去12，减了多少次后，结果是12．
<gadget id="calculator">168 - 12</gadget>
<output>156</output>

<gadget id="calculator">156 / 12</gadget>
<output>13</output>

<result>13</result>