On the clock face, if the hour hand rotates 12°, how many degrees does the minute hand rotate?
钟面上，如果时针旋转12°，那么分针旋转多少度．
<gadget id="calculator">12 / 0.5</gadget>
<output>24</output>

<gadget id="calculator">24 * 6</gadget>
<output>144</output>

<result>144</result>