A rectangle has a perimeter of 100 meters and its length is 1.5 times its width. What is the width of the rectangle? Please calculate the equation and write down the calculation process.
一个长方形周长是100米，已知长是宽的1.5倍，长方形的宽是多少？请列方程计算并写出计算过程．
<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<result>20</result>