When Xiaohong calculated 24*(a+9), she wrote 24*a+9 by mistake. How much is the difference from the correct result?
小红在计算24*(a+9)时，错写成了24*a+9，和正确的结果相差多少？
<gadget id="calculator">24 * 9</gadget>
<output>216</output>

<gadget id="calculator">216 - 9</gadget>
<output>207</output>

<result>207</result>