cuboid is divided into two parts to form two small cubes. The surface area of the original rectangle is increased by 50 square centimeters. What is the surface area of the original rectangle?
一个长方体等分成两份就成为两个小正方体，表面积比原来长方形增加了50平方厘米，原来长方形的表面积是多少．
<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<gadget id="calculator">25 * 10</gadget>
<output>250</output>

<result>250</result>