The perimeter of both the square and the rectangle is 36 cm, the width of the rectangle is 1/5 of the length, and the area of the rectangle is equal to the area of the square.
正方形和长方形的周长都是36厘米，长方形的宽是长的(1/5)，这个长方形的面积是正方形面积的多少．
<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">36 / 2 / 6</gadget>
<output>3</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 - 15</gadget>
<output>3</output>

<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<gadget id="calculator">9 * 9</gadget>
<output>81</output>

<gadget id="calculator">45 / 81</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>