Xiao Ming types 30 characters in one minute, how many characters are typed every 50 seconds.
小明一分钟打30个字，每50秒打多少字．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">30 * (5/6)</gadget>
<output>25</output>

<result>25</result>