If the length of a cuboid is increased by 3 cm, its width and height remain unchanged; or if its width is increased by 4 cm, its length and height remain unchanged; or if its height is increased by 5 cm, its length and width remain unchanged, and its volume increases by 60 cubic centimeter ． What is the original surface area of the cuboid in square centimetres?
一个长方体，如果长增加3厘米，宽、高都不变；或者宽增加4厘米，长、高都不变；或者高增加5厘米，长、宽都不变，它的体积都增加60立方厘米．那么这个长方体原来的表面积是多少平方厘米．
<gadget id="calculator">12 + 15 + 20</gadget>
<output>47</output>

<gadget id="calculator">47 * 2</gadget>
<output>94</output>

<result>94</result>