At 2:20 p.m., what is the acute angle formed by the hour and minute hands?
下午2点20分时，时针和分针所成的锐角是多少度．
<gadget id="calculator">20 / 60</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 * (1/3)</gadget>
<output>10</output>

<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">30 + 20</gadget>
<output>50</output>

<result>50</result>