Some students form 8 circles or 4 circles (one circle within one circle), it is known that the number of people in each circle from outside to inside is 4 less, and the number of people in the outermost circle of 8 circles is smaller than that of the outermost circle of 4 circles Less than 20 people. Ask for the number of students.
一些学生围成8圈或围成4圈(一圈套一圈)，已知从外向内各圈人数依次少4人，围成8圈的最外圈人数比围成4圈的最外圈人数少20人．求学生的人数．
<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">80 + 64</gadget>
<output>144</output>

<gadget id="calculator">80 + 144</gadget>
<output>224</output>

<result>224</result>