There are 4 pieces of soap in the shape of a rectangular parallelepiped. The length is 10 cm, the width is 5 cm, and the height is 3 cm. If these 4 pieces of soap are put in a packaging box, what is the minimum square centimeter of material used in this packaging box?
有4块形状是长方体的肥皂，量得它的长是10厘米，宽5厘米，高3厘米．如果把这4块肥皂放在一个包装盒里，那么这种包装盒所用材料最少是多少平方厘米？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<gadget id="calculator">12 * 5</gadget>
<output>60</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">120 + 60 + 50</gadget>
<output>230</output>

<gadget id="calculator">230 * 2</gadget>
<output>460</output>

<result>460</result>