There is a parallelogram wheat field with a base of 25m and a height of 20m. A total of 450 kilograms of wheat is harvested in this field. How many kilograms of wheat are harvested on average per square meter?
有一块平行四边形麦田，底25m，高20m．在这块田里共收小麦450千克，平均每平方米收小麦多少千克？
<gadget id="calculator">25 * 20</gadget>
<output>500</output>

<gadget id="calculator">450 / 500</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>