How many degrees does the clock hand rotate clockwise from "3" to "7".
时钟的指针从"3"顺时针旋转到"7"，旋转了多少度．
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">360 / 12</gadget>
<output>30</output>

<gadget id="calculator">4 * 30</gadget>
<output>120</output>

<result>120</result>