cuboid whose width and height are equal, if the length is subtracted by 2.5 cm, it becomes a cube with a surface area of 150 cm**2. How many times the length of the cuboid is the width?
一个长方体，它的宽和高相等，若把长去掉2.5cm，就成为表面积150cm**2的正方体．长方体的长是宽的多少倍？
<gadget id="calculator">5 + 2.5</gadget>
<output>7.5</output>

<gadget id="calculator">7.5 / 5</gadget>
<output>1.5</output>

<result>1.5</result>