Plant fruit trees in a rectangular orchard with a length of 18 meters and a width of 10 meters. Each tree covers an average area of 2 square meters. How many fruit trees can be planted in this orchard?
在一块长18米，宽10米的长方形果园里种果树，平均每棵占地2平方米，这块果园能种果树多少棵？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">18 * 5</gadget>
<output>90</output>

<result>90</result>