When Xiao Ming calculated the division, he regarded the divisor 36 as 39, and the resulting quotient was 13; the remainder was 33. What should be the correct quotient
小明在计算除法时，把除数36看成了39，结果得到的商是13；还余33．正确的商应该是多少
<gadget id="calculator">39 * 13</gadget>
<output>507</output>

<gadget id="calculator">507 + 33</gadget>
<output>540</output>

<gadget id="calculator">540 / 36</gadget>
<output>15</output>

<result>15</result>