The perimeter of a rectangle is 70 cm, and the ratio of its length to width is 4:3. What is the area of the rectangle?
一个长方形的周长是70厘米，它的长、宽之比是4：3，这个长方形的面积是多少？
<gadget id="calculator">70 / 2</gadget>
<output>35</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">35 * (4/7)</gadget>
<output>20</output>

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

<gadget id="calculator">35 * (3/7)</gadget>
<output>15</output>

<gadget id="calculator">20 * 15</gadget>
<output>300</output>

<result>300</result>