If the length of a cuboid is increased by 3 cm, the volume will increase by 45 cubic centimeters; if the width is increased by 2 cm, the volume will increase by 42 cubic centimeters; if the height is increased by 1 cm, the volume will increase by 35 cubic centimeters. Find the surface area of the original cuboid.
一个长方体如果长增加3厘米，体积将增加45立方厘米；如果宽增加2厘米，体积将增加42立方厘米；如果高增加1厘米，体积将增加35立方厘米，求原来长方体的表面积．
<gadget id="calculator">35 / 1</gadget>
<output>35</output>

<gadget id="calculator">42 / 2</gadget>
<output>21</output>

<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<gadget id="calculator">35 + 21 + 15</gadget>
<output>71</output>

<gadget id="calculator">71 * 2</gadget>
<output>142</output>

<result>142</result>