The little sloppy miscalculated 30*(□+5) into 30*□+5, how much is the difference between his calculated result and the correct result
小马虎把30*(□+5)错算成30*□+5，他计算的结果与正确结果相差多少
<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<gadget id="calculator">150 - 5</gadget>
<output>145</output>

<result>145</result>