Xiaojun and Xiaohong share 52 story books, and Xiaojun gives (1/4) of his own books to Xiaohong. At this time, the number ratio of Xiaojun and Xiaohong is 6:7. How many books did Xiaojun have in the beginning?
小军和小红共有故事书52本，小军把自己的书的(1/4)送给小红，此时小军和小红书的数量比是6：7．最初小军有书多少本．
<gadget id="calculator">6 + 7</gadget>
<output>13</output>

<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(6/13) / (3/4)</gadget>
<output>8/13 = around 0.615385</output>

<gadget id="calculator">52 * (8/13)</gadget>
<output>32</output>

<result>32</result>