How many degrees does the clock hand rotate clockwise from "3" to "6".
时钟的指针从"3"顺时针旋转到"6"，旋转了多少度．
<gadget id="calculator">6 - 3</gadget>
<output>3</output>

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

<gadget id="calculator">3 * 30</gadget>
<output>90</output>

<result>90</result>