If the length, width and height of a cuboid are 10 cm, 8 cm, and 5 cm, what is the area of the left side in square centimeters?
一个长方体长宽高分别是10厘米、8厘米、5厘米，左面的面积是多少平方厘米．
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>