At 3:30, what is the angle formed by the minute hand and the hour hand on the clock face?
3点半时，钟面上分针与时针组成的角是多少度
<gadget id="calculator">2 * 30</gadget>
<output>60</output>

<gadget id="calculator">60 + 15</gadget>
<output>75</output>

<result>75</result>