Aunt Wang's family raised a total of 180 ducks, and the ratio of the number of male ducks to the number of female ducks was 2:3. How many drakes are there?
王大妈家共养了180只鸭，其中公鸭的只数与母鸭只数的比是2：3．公鸭有多少只？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 * (2/5)</gadget>
<output>72</output>

<result>72</result>