2400 eggs were used to incubate chicks, but 5% of them failed to hatch. How many chicks hatched?
用2400个鸡蛋孵小鸡，结果有5%没有孵出小鸡．孵出小鸡多少只？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">2_400 * (19/20)</gadget>
<output>2_280</output>

<result>2_280</result>