When a number is divided by 18, the quotient is 12 and the remainder is an integer. What is the largest number?
一个数除以18，商是12，余数是整数，这个数最大是多少？
<gadget id="calculator">12 * 18</gadget>
<output>216</output>

<gadget id="calculator">18 - 1</gadget>
<output>17</output>

<gadget id="calculator">216 + 17</gadget>
<output>233</output>

<result>233</result>