The students in the craft group of the school made "Fuwa". First, each person made a cloth Fuwa, then every 2 people made 1 clay Fuwa, then every 4 people made 1 electric Fuwa, and finally every 4 people made 3 Fuwa with plaster Color Fuwa. According to statistics, the craft group made a total of 90 Fuwa. How many students are there in the craft group of the school?
学校工艺小组学生做"福娃"，先每人做了1个布福娃，接着每2个人做1个泥福娃，再是每4个人做1个电动福娃，最后每4个人用石膏做了3个彩色福娃．经统计，工艺组共做了90个福娃．学校工艺组共有学生多少人．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (1/2) + (1/4) + (3/4)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">90 / (5/2)</gadget>
<output>36</output>

<result>36</result>