After subtracting 13 from a number, it is 512 more than the difference between 56 and 38. What is this number?
一个数减去13以后，比56与38的差多512，这个数是多少？
<gadget id="calculator">56 - 38</gadget>
<output>18</output>

<gadget id="calculator">18 + 512 + 13</gadget>
<output>543</output>

<result>543</result>