Xiao Ming wrote 9*(口+8) as 9*口+8 by mistake, how far is her result from the correct answer?
小明把9*(口+8)错写成了9*口+8，她的结果与正确答案相差多少
<gadget id="calculator">72 - 8</gadget>
<output>64</output>

<result>64</result>