square tin box without a cover has a side length of (3/5) decimeters. Now paint the outside of the tin box. How many square decimeters is the painted area?
一个没有盖的正方体铁盒，棱长是(3/5)分米，现在给这个铁盒外刷上漆，那么刷漆面积是多少平方分米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * (3/5) * 5</gadget>
<output>9/5 = around 1.8</output>

<result>9/5 = around 1.8</result>