cuboid with a height of 26 cm is cut horizontally into two small cuboids, and the surface area is increased by 80 cm2. Find the volume of the original cuboid.
一个长方体高26厘米，沿着水平方向横切成两个小长方体，表面积增加了80平方厘米，求原来长方体的体积．
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">40 * 26</gadget>
<output>1_040</output>

<result>1_040</result>