The perimeter of a rectangle is 49 meters, 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49米，长和宽的比是4：3，这个长方形的面积是多少平方米？
<gadget id="calculator">49 / 2</gadget>
<output>49/2 = around 24.5</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(49/2) * (4/7)</gadget>
<output>14</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(49/2) * (3/7)</gadget>
<output>21/2 = around 10.5</output>

<gadget id="calculator">14 * (21/2)</gadget>
<output>147</output>

<result>147</result>