Xiao Ming wants to type an article with 216 characters, and he typed 54 characters in 6 minutes. How many minutes will it take to finish typing the remaining characters at this speed?
小明要打一篇216个字的文章，6分钟打了54个字，照这个速度打完剩下的字需要几分钟？
<gadget id="calculator">216 - 54</gadget>
<output>162</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<gadget id="calculator">162 / 9</gadget>
<output>18</output>

<result>18</result>