The students of Jiangcun Elementary School planted 6,800 castor beans, and on average every 100 plants can harvest 25 kilograms of castor beans. If each kilogram of castor beans can extract 0.25 kilograms of oil, how many kilograms of castor beans can be extracted in total?
江村小学学生种6800棵蓖麻，平均每100棵可以收蓖麻籽25千克，如果每千克蓖麻籽可榨油0.25千克，这些蓖麻籽共可榨油多少千克．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 6_800 * 0.25</gadget>
<output>425</output>

<result>425</result>