Xiaohong's family raised 34 chickens and ducks, and later bought 20 more chickens. At this time, the number of chickens and ducks was the same. How many ducks did her family raise?
小红家养鸡和鸭一共34只，后来又买来20只鸡，这时鸡和鸭的只数同样多，她家原来养鸭多少只？
<gadget id="calculator">34 + 20</gadget>
<output>54</output>

<gadget id="calculator">54 / 2</gadget>
<output>27</output>

<result>27</result>