The children in class 4 and 1 line up in a row, among which there are 26 boys, and there is 1 girl between every 2 boys, how many girls are there in class 4 and 1?
四1班的孩子们排成一排，其中有26名男生，每2名男生之间有1名女生，四1班共有多少名女生．
<gadget id="calculator">26 - 1</gadget>
<output>25</output>

<gadget id="calculator">26 + 25</gadget>
<output>51</output>

<result>51</result>