The ratio of length to width of a rectangle is 4:3. If the length is reduced by 3 meters and the width is increased by 1 meter, it becomes a square. Find the area of the original rectangle.
一个长方形的长与宽的比是4：3，如果长减少3米，宽增加1米就变成正方形，求原来长方形的面积．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">(4/3) - 1</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / (1/3)</gadget>
<output>12</output>

<gadget id="calculator">(4/3) * 12 * 12</gadget>
<output>192</output>

<result>192</result>