If the perimeter of a rectangle is 12 cm and the width is 20% of its length, what is the area of the rectangle in square centimeters?
一个长方形的周长是12厘米，宽是长的20%，长方形的面积是多少平方厘米．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">20 + 100</gadget>
<output>120</output>

<gadget id="calculator">20 / 120</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<result>5</result>