In a right-angled triangle open space, the two right-angled sides are 20 meters and 15 meters respectively. If there is one fruit tree per 6 square meters, how many fruit trees can be planted in this open space?
一个直角三角形的空地，两个直角边分别是20米和15米，如果每6平方米钟一棵果树，这块空地一共能种多少棵果树？
<gadget id="calculator">15 / 2 / 6</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">20 * (5/4)</gadget>
<output>25</output>

<result>25</result>