Someone placed a five-layer hollow square on a small square chessboard with a side length of 1 cm. If 16 more chess pieces can be placed in the hollow part of the square, then the outermost chess pieces of the square What is the perimeter of the formed figure in centimeters? (The size of the pieces is ignored).
某人在边长为1厘米的小方格的棋盘上摆了一个五层的空心方阵，如果这个方阵中间空心的部分还可以再放16个棋子，那么这个方阵最外层的棋子组成的图形的周长是多少厘米？(棋子的大小忽略不计)．
<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">4 + 10</gadget>
<output>14</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<result>56</result>