A farmer raises 80 ducks, which is 1/4 more than chickens. How many chickens does this farmer raise?
某农户养鸭80只，比鸡的只数多(1/4)，这个农户养鸡多少只？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80 / (5/4)</gadget>
<output>64</output>

<result>64</result>