If the length of a cuboid is increased by 2 cm, the volume will increase by 40 cubic centimeters; if the width is increased by 3 cm, the volume will increase by 90 cubic centimeters; if the height is increased by 4 cm, the volume will increase by 160 cubic centimeters. What is the surface area of the original cuboid in square centimeters?
一个长方体，如果长增加2厘米，则体积增加40立方厘米；如果宽增加3厘米，则体积增加90立方厘米；如果高增加4厘米，则体积增加160立方厘米．原长方体的表面积是多少平方厘米．
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">90 / 2</gadget>
<output>45</output>

<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<gadget id="calculator">20 + 45 + 80</gadget>
<output>145</output>

<gadget id="calculator">145 * 2</gadget>
<output>290</output>

<result>290</result>