In a flower bed with an area of 1 hectare, 4 roses are planted per square meter, how many roses can be planted in the flower bed.
在一块面积为1公顷的花坛里，按1平方米栽4棵玫瑰花，花坛里能栽多少棵玫瑰花．
<gadget id="calculator">1 * 10_000 * 4</gadget>
<output>40_000</output>

<result>40_000</result>