The length of the rectangle is 4 meters, and the width is the length (3/4), what is its perimeter in meters?
长方形长4米，宽是长的(3/4)，它的周长是多少米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">4 * (3/4)</gadget>
<output>3</output>

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

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>