How many degrees does the pointer on the clock face rotate clockwise around point O from 3 to 8?
钟面上指针从3绕点O顺时针旋转多少度到8．
<gadget id="calculator">8 - 3</gadget>
<output>5</output>

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

<gadget id="calculator">5 * 30</gadget>
<output>150</output>

<result>150</result>