The number of geese raised in the farm is 2/3 of that of chickens, and the number of ducks raised is 3/4 of geese. There are 180 chickens, how many ducks are raised?
饲养场养鹅的只数是养鸡的(2/3)，养鸭的只数是鹅的(3/4)，养鸡180只，养鸭多少只？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">180 * (2/3) * (3/4)</gadget>
<output>90</output>

<result>90</result>