The opening ceremony of the sports meeting needs to contact the phalanx, and the number of people on the outermost layer of each phalanx is 48 people. How many people are there in each square.
运动会开幕式需要联系方阵，每个方阵最外一层的人数为48人．每个方阵共有多少人．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 + 1</gadget>
<output>13</output>

<gadget id="calculator">13 * 13</gadget>
<output>169</output>

<result>169</result>