Qingfeng Grain Store brought in 1800 kilograms of rice and sold it (5/9), how many kilograms are left?
庆丰粮店运进1800千克大米，卖出(5/9)，还剩多少千克？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1_800 * (4/9)</gadget>
<output>800</output>

<result>800</result>