A piece of wire surrounds a rectangle. The length of the rectangle is 15 cm and the area is 105 cm2. Now the wire is changed into a square. What is the area of the square?
一根铁丝围成长方形，长方形的长15厘米、面积105平方厘米，现把铁丝改围成正方形，正方形面积是多少？
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">12 * (1/2)</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>