20 little rabbits stand in a row, and there is a carrot between every two adjacent little rabbits. How many carrots are there in total?
20只小兔站成一排，每相邻两只小兔中间有一个胡萝卜，一共有多少个胡萝卜．
<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<result>19</result>