When Xiaoqiang calculated 540/(□+15), he did the division first and then the addition. The result was 123. What is the correct result of this question?
小强在计算540/(□+15)时，先算除法后算加法，得到的结果是123，这道题的正确结果是多少．
<gadget id="calculator">123 - 15</gadget>
<output>108</output>

<gadget id="calculator">540 / 108</gadget>
<output>5</output>

<gadget id="calculator">5 + 15</gadget>
<output>20</output>

<gadget id="calculator">540 / 20</gadget>
<output>27</output>

<result>27</result>