Xiao Ming wrongly wrote 8*(□+4) as 8*□+4, the result he got is much smaller than the correct answer
小明把8*(□+4)错写成8*□+4，他得到的结果要比正确答案小了多少
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">8 * 1</gadget>
<output>8</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">40 - 12</gadget>
<output>28</output>

<result>28</result>