A rectangle is formed by a piece of iron wire, which is 1.5 meters long and 0.5 meters wide. If the iron wire is used to form a square, what is the area of the square in square meters?
用一根铁丝围成一个长方形，长1.5米，宽0.5米，如果把这根铁丝围成正方形，那么正方形的面积是多少平方米．
<gadget id="calculator">1.5 + 0.5</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

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

<gadget id="calculator">1 * 1</gadget>
<output>1</output>

<result>1</result>