There are 12 fewer boys than twice the number of girls, 22 boys, and how many girls are there. How many
男生比女生人数的2倍少12人，男生有22人，女生有多少人．多少
<gadget id="calculator">22 + 12</gadget>
<output>34</output>

<gadget id="calculator">34 / 2</gadget>
<output>17</output>

<result>17</result>