The perimeter of a rectangle is 120 cm, and the ratio of length to width is 2:1, what is its area in square centimeters?
一个长方形的周长是120厘米，长与宽的比是2：1，它的面积是多少平方厘米？
<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 * (2/3)</gadget>
<output>40</output>

<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<gadget id="calculator">40 * 20</gadget>
<output>800</output>

<result>800</result>