Xiaoming watered 15 trees, the number of trees watered by Xiaohua belonged to Xiaoming (4/3), and the number of trees watered by Xiaohua belonged to Xiaojun (4/5). How many trees does Xiaojun water?
小明浇了15棵树，小华浇树的棵数是小明的(4/3)，小华浇树的棵数是小军的(4/5)．小军浇树多少棵？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/3) / (4/5)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">15 * (5/3)</gadget>
<output>25</output>

<result>25</result>