At 9:30 on the clock face, what is the smallest angle formed by the hour and minute hands?
钟面上9点30分时，时针与分针组成的角最小的多少度．
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">15 + 2.5</gadget>
<output>17.5</output>

<gadget id="calculator">6 * 17.5</gadget>
<output>105</output>

<result>105</result>