A store shipped 1800 kilograms of apples, sold (2/9) of the total on the first day, 350 kilograms on the second day, and 20% of the total on the third day, how many kilograms are left.
某商店运来1800千克苹果，第一天卖掉总数的(2/9)，第二天卖掉350千克，第三天又卖掉总数的20%，还剩多少千克．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1_800 * (2/9)</gadget>
<output>400</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1_800 * (1/5)</gadget>
<output>360</output>

<gadget id="calculator">1_800 - 350 - 400 - 360</gadget>
<output>690</output>

<result>690</result>