A certain grain store shipped some flour, sold (1/3) in the first ten days of April, and sold 600kg in the middle of April. At this time, there were 540kg left. How many kilograms of flour did the grain store ship?
某粮店运来一些面粉，四月上旬卖出(1/3)，中旬卖出了600kg，这时还剩540kg，粮店运来面粉多少千克？
<gadget id="calculator">600 + 540</gadget>
<output>1_140</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1_140 / (2/3)</gadget>
<output>1_710</output>

<result>1_710</result>