It costs 25 yuan per square meter to lay lawn on a square open space with a side length of 9 meters. How much is the total cost?
给一块边长是9米的正方形空地铺草坪，每平方米草坪25元，一共需要多少元？
<gadget id="calculator">9 * 9 * 25</gadget>
<output>2_025</output>

<result>2_025</result>