There are 20 boys in the school's science and technology group, 4 fewer than twice the number of girls. How many people are there in the school science and technology group?
学校科技组有男生20人，比女生的2倍少4人．学校科技组有多少人？
<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 20</gadget>
<output>32</output>

<result>32</result>