There are 38 white rabbits raised in the farm, and the number of black rabbits raised is half of the number of white rabbits. How many rabbits are there in the farm?
饲养场养了38只白兔，养的黑兔的只数是白兔的一半．饲养场一共养了多少只兔子﹖
<gadget id="calculator">38 / 2</gadget>
<output>19</output>

<gadget id="calculator">38 + 19</gadget>
<output>57</output>

<result>57</result>