From 6:45 to 7:15, how many degrees does the minute hand on the clock face rotate clockwise?
从6：45到7：15，钟面上的分针顺时针旋转了多少度．
<gadget id="calculator">360 / 12</gadget>
<output>30</output>

<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<result>180</result>