The ratio of the number of boys and girls in class 51 is 11:10. It is known that there are 55 boys and how many girls are there.
五1班男女生人数的比是11：10，已知男生55人，女生有多少人．
<gadget id="calculator">55 / 11</gadget>
<output>5</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<result>50</result>