Due to carelessness, the little sloppy miscalculated 40*(□+3) as 40*□+3. Please help me to calculate the difference between his results.
小马虎由于粗心大意，把40*(□+3)错算成40*□+3，请你帮忙算一算，他的结果相差多少．
<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">120 - 3</gadget>
<output>117</output>

<result>117</result>