There are 18 poplar trees in the park, and the number of pine trees is as many as poplar trees (8/9). How many pine trees are there in the park?
公园有杨树18棵，松树的棵数是杨树的(8/9)．公园内有松树多少棵？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">18 * (8/9)</gadget>
<output>16</output>

<result>16</result>