We have planted a total of 500 sunflowers, each of which can harvest 0.25 kilograms of sunflower seeds, and can extract 0.18 kilograms of oil per kilogram of sunflower seeds. How many kilograms of oil can be extracted from the sunflower seeds we harvested?
我们一共种了500棵向日葵，每棵可收葵花籽0.25千克，每千克葵花籽还可以榨油0.18千克，我们收的葵花籽一共可榨油多少千克？
<gadget id="calculator">500 * 0.25 * 0.18</gadget>
<output>22.5</output>

<result>22.5</result>