Three similar small cubes are used to form a rectangle, and the surface area is reduced by 1 square decimeter. What is the surface area of each small cube?
用三个同样的小正方体拼成一个长方形，表面积减少1平方分米，每个小正方体的表面积是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 6</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>