rectangle is surrounded by an iron wire, the length is 36 cm, and the width is 24 cm. If this wire is re-enclosed to form a square, what is its area?
用一根铁丝围成一个长方形，长36厘米，宽24厘米，如果把这根铁丝重新围成一个正方形，它的面积是多少？
<gadget id="calculator">36 + 24</gadget>
<output>60</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 * (1/2)</gadget>
<output>30</output>

<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<result>900</result>