Xiaomei arranged some paper cranes into a hollow square array. It is known that she placed 44 paper cranes on the outermost layer and 20 paper cranes on the innermost layer. So, how many origami cranes did Xiaomei use to complete the formation?
小美将一些纸鹤摆成一个空心的方阵．已知最外层她摆了44只纸鹤，最内层摆了20只纸鹤．那么，小美摆完这个方阵一共用了多少只纸鹤？
<gadget id="calculator">44 - 20</gadget>
<output>24</output>

<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">80 + 8 + 16 + 24</gadget>
<output>128</output>

<result>128</result>