The length of a cuboid is 3 cm, the width is 4 cm, and the height is 5 cm. What is its surface area in square centimeters?
一个长方体的长是3厘米，宽是4厘米，高是5厘米，它的表面积是多少平方厘米
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">12 + 15 + 20</gadget>
<output>47</output>

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

<result>94</result>