Cut a cube 30 cm long into four cuboids of the same size. What is the surface area of each cuboid?
把一个长是30厘米的正方体木块切成同样大小的四个长方体．每个长方体的表面积是多少？
<gadget id="calculator">30 * 30 * 2</gadget>
<output>1_800</output>

<gadget id="calculator">30 / 4</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">30 * (15/2) * 4</gadget>
<output>900</output>

<gadget id="calculator">1_800 + 900</gadget>
<output>2_700</output>

<result>2_700</result>