When Xiaohong is calculating a question, she writes 5*(□+7) as 5*□+7 by mistake. How much difference does she get from the correct result?
小红在计算一道题时，把5*(□+7)错写成5*□+7，她得到的结果与正确相差多少？
<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<gadget id="calculator">35 - 7</gadget>
<output>28</output>

<result>28</result>