When a number is added, subtracted, or divided by itself, the sum, difference, and quotient add up to 39. What is the number?
一个数与它自己相加、减、除，其和、差、商相加为39，这个数是多少．
<gadget id="calculator">39 - 0 - 1</gadget>
<output>38</output>

<gadget id="calculator">38 / 2</gadget>
<output>19</output>

<result>19</result>