A cuboid has a length of 12 cm, a height of 3 cm, and a volume of 90 cubic cm. What is the surface area of the rectangle?
一个长方体的长是12厘米，高是3厘米，体积是90立方厘米，这个长方形的表面积是多少？
<gadget id="calculator">90 / 12 / 3</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">12 * (5/2)</gadget>
<output>30</output>

<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">3 * (5/2)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">30 + 36 + (15/2)</gadget>
<output>147/2 = around 73.5</output>

<gadget id="calculator">(147/2) * 2</gadget>
<output>147</output>

<result>147</result>