The volume of a cuboid is 105dm**3, and its length, width, and height are integers in centimeters, and all of them are prime numbers. What is its surface area in dm**2?
一个长方体的体积是105dm**3，它的长、宽、高均为整厘米数，且都是质数，那么它的表面积是多少dm**2．
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">3 * 7</gadget>
<output>21</output>

<gadget id="calculator">5 * 7</gadget>
<output>35</output>

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

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

<result>142</result>