Xiaofang wrongly wrote 9*(□+5) as 9*□+5, how much less is the calculation result she got than the correct result
小芳把9*(□+5)错写成9*□+5，她得到的计算结果比正确结果少了多少
<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<gadget id="calculator">45 - 5</gadget>
<output>40</output>

<result>40</result>