Use 3.6 decimeters of iron wire to form a rectangle. The ratio of length to width is 5:4. What is the area of the rectangle in square centimeters?
用3.6分米的铁丝围成一个长方形，长和宽的比是5：4，这个长方形的面积是多少平方厘米．
<gadget id="calculator">3.6 / 2</gadget>
<output>1.8</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

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

<gadget id="calculator">1.8 * (5/9)</gadget>
<output>1</output>

<gadget id="calculator">1.8 - 1</gadget>
<output>0.8</output>

<gadget id="calculator">1.8 * (5/9) * 0.8 * 100</gadget>
<output>80</output>

<result>80</result>