If the difference between 13 times the sum of a number and 13 and 13 is divided by 13, the resulting quotient is 13, what is the number?
一个数与13的和的13倍与13的差除以13，所得的商等于13，则这个数是多少．
<gadget id="calculator">13 * 13</gadget>
<output>169</output>

<gadget id="calculator">169 - 169</gadget>
<output>0</output>

<gadget id="calculator">13 + 0</gadget>
<output>13</output>

<gadget id="calculator">13 / 13</gadget>
<output>1</output>

<result>1</result>