Xiao Ming typed 150 characters in 3 minutes, how many characters can he type in 5 minutes?
小明三分钟打了150个字，他5分钟能打多少个字．
<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">50 * 5</gadget>
<output>250</output>

<result>250</result>