batch of oranges is shipped from the fruit shop, 40% of the total number is sold on the first day, and 140 kilograms are sold on the second day. The mass ratio of the rest to the sold is 4:3. How many kilograms does this batch of oranges weigh?
水果店运来一批橘子，第一天卖出总数的40%，第二天卖出140千克，剩下的与卖出的质量比是4：3，这批橘子重多少千克？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (2/5) - (4/7)</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">140 / (1/35)</gadget>
<output>4_900</output>

<result>4_900</result>