rope with a length of 140 meters is formed into a rectangle. The ratio of length to width is known to be 4:3. What is the area of the rectangle formed?
将一条长为140米的绳子围成一个长方形，已知长和宽的比为4：3，求围成的长方形的面积是多少？
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">140 / 2 / 7</gadget>
<output>10</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">40 * 30</gadget>
<output>1_200</output>

<result>1_200</result>