There are 45 ginkgo trees on campus, and there are fewer camphor trees than ginkgo trees (4/9). How many camphor trees?
校园里有银杏45棵，香樟树比银杏少(4/9)．香樟树多少棵？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">45 * (5/9)</gadget>
<output>25</output>

<result>25</result>