If the side length of a square is (3/5) decimeters, what is its perimeter?
一个正方形的边长是(3/5)分米，它的周长是多少分米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 4</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>