group of ducks are swimming in the river. There are 8 ducks in front of 8 ducks, 8 ducks behind the 8 ducks, 8 ducks on the left of the 8 ducks, and 8 ducks on the right of the 8 ducks. How many ducks are there in the river?
一群鸭子排着队在河里游泳，它们是8只前面有8只，8只后面有8只，8只左面有8只，8只右面有8只，请问河里一共有几只鸭子．
<gadget id="calculator">8 + 8</gadget>
<output>16</output>

<gadget id="calculator">16 * 16</gadget>
<output>256</output>

<result>256</result>