At 9:30, what is the angle formed by the hour and minute hands on the clock face?
9时30分时，钟面上时针和分针所成的角是多少度．
<gadget id="calculator">3 * 30</gadget>
<output>90</output>

<gadget id="calculator">90 + 15</gadget>
<output>105</output>

<result>105</result>