chicken farm sells a batch of broilers, 40% of the total number of broilers are sold for the first time, and 25% of the total number is sold for the second time, leaving 1400 broilers. How many broilers did the chicken farm originally have?
某养鸡场卖一批肉鸡，第一次卖出肉鸡总数的40%，第二次卖出总数的25%，还剩肉鸡1400只．养鸡场原来有肉鸡多少只？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (2/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1_400 / (7/20)</gadget>
<output>4_000</output>

<result>4_000</result>