The fruit store brings in a batch of apples, sells 2/7 of the total on the first day, and sells 3/8 of the total on the second day, and sells 75kg more on the second day than the first day. How many kilograms of apples are in?
水果店运进一批苹果，第一天卖出总数的(2/7)，第二天卖出总数的(3/8)，第二天比第一天多卖出75kg，水果店共运进多少千克苹果？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/8) - (2/7)</gadget>
<output>5/56 = around 0.089286</output>

<gadget id="calculator">75 / (5/56)</gadget>
<output>840</output>

<result>840</result>