A square vegetable field with a side length of 10 meters can harvest 9 kilograms of radishes per square meter on average. How many kilograms of radishes can be harvested in this vegetable field?
一块边长是10米的正方形菜地，平均每平方米收9千克萝卜，这块菜地一共能收萝卜多少千克？
<gadget id="calculator">10 * 10 * 9</gadget>
<output>900</output>

<result>900</result>