The little sloppy mistakenly wrote 40*(□+4) as 40*□+4 due to his carelessness. Please do the math for him. How much is the difference between the result he got and the correct result?
小马虎由于粗心大意把40*(□+4)错写成40*□+4，请你帮忙算一算，他得到的结果与正确的结果相差多少？
<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<gadget id="calculator">160 - 4</gadget>
<output>156</output>

<result>156</result>