There are 4,000 chickens and ducks in the farm, and the ratio of chickens to ducks is 5:3. At this time, another batch of chickens is purchased. At this time, chickens account for 175% of the total number of ducks. How many chickens are purchased?
养殖场有鸡鸭4000只，其中鸡与鸭的只数比是5：3，这时又购进一批鸡，这时鸡占鸭总数的175%，那么又购进多少只鸡．
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">4_000 * (3/8)</gadget>
<output>1_500</output>

<gadget id="calculator">175 / 100</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">1_500 * (7/4)</gadget>
<output>2_625</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">4_000 * (5/8)</gadget>
<output>2_500</output>

<gadget id="calculator">2_625 - 2_500</gadget>
<output>125</output>

<result>125</result>