Xiaogang has 14 books of science and technology books, and the book of fairy tales is 1 less than the book of science and technology books (3/7), so how many books of fairy tales are there for Xiaogang?
小刚有科技读物14本，童话故事书的本书是科技读物的(3/7)少1本，则小刚童话故事书为多少本．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">14 * (3/7)</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<result>5</result>