Uncle Chen raises 72 chickens, ducks, and geese, among which (5/9) are chickens. The ratio of ducks to geese is 5:3. How many geese are there?
陈伯伯养鸡、鸭、鹅共72只，其中(5/9)是鸡，鸭和鹅的比是5：3，鹅有多少只？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<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">72 * (4/9) * (3/8)</gadget>
<output>12</output>

<result>12</result>