The poultry farm has 120 chickens. The number of geese raised is that of chickens (3/4). There are as many ducks as there are geese (2/9). How many ducks are there in the poultry farm?
禽场养了120只鸡．养的鹅的只数是鸡的(3/4)．养的鸭的只数是鹅的(2/9)．禽场养了多少只鸭？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">120 * (3/4) * (2/9)</gadget>
<output>20</output>

<result>20</result>