When a number is divided by 27, the quotient is 9 and the remainder is 6. What is the number?
一个数除以27，商是9，余数是6，这个数是多少．
<gadget id="calculator">27 * 9</gadget>
<output>243</output>

<gadget id="calculator">243 + 6</gadget>
<output>249</output>

<result>249</result>