The perimeter of a rectangle is 1.4 decimeters, and the ratio of length to width is 4:3. What is the area of the rectangle?
一个长方形的周长是1.4分米，长和宽的比是4：3，这个长方形的面积是多少平方分米．
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">1.4 / 2 / 7</gadget>
<output>0.1</output>

<gadget id="calculator">4 * 0.1</gadget>
<output>0.4</output>

<gadget id="calculator">3 * 0.1</gadget>
<output>0.3</output>

<gadget id="calculator">0.4 * 0.3</gadget>
<output>0.12</output>

<result>0.12</result>