There are 218 boys in the third grade, 12 fewer than twice the number of girls. How many girls are there?
三年级有男生218人，比女生的2倍少12人．女生多少人．
<gadget id="calculator">218 + 12</gadget>
<output>230</output>

<gadget id="calculator">230 / 2</gadget>
<output>115</output>

<result>115</result>