A rectangular frame with a length of 15 cm and a width of 7 cm can be made with a piece of iron wire. If this wire is made into a square frame, what is the area in square centimeters?
用一根铁丝能制成长15厘米、宽7厘米的长方形框架，如果把这根铁丝制成正方形框架，面积应是多少平方厘米？
<gadget id="calculator">15 + 7</gadget>
<output>22</output>

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

<gadget id="calculator">22 * (1/2)</gadget>
<output>11</output>

<gadget id="calculator">11 * 11</gadget>
<output>121</output>

<result>121</result>