The fruit shop sells 1000kg of fruit on the first day, and sells less (1/5) on the second day than on the first day. How many kilograms of fruit are sold on the second day?
水果店第一天卖出1000kg水果，第二天比第一天少卖出(1/5)，第二天卖出水果多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_000 * (4/5)</gadget>
<output>800</output>

<result>800</result>