What is the angle between the hour and minute hands at 9:15?
9时15分时针和分针的夹角是多少度？
<gadget id="calculator">90 - 7.5</gadget>
<output>82.5</output>

<gadget id="calculator">82.5 + 90</gadget>
<output>172.5</output>

<result>172.5</result>