If the side length of a square is (7/10) meters, what is its perimeter?
一个正方形的边长是(7/10)米，它的周长是多少．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(7/10) * 4</gadget>
<output>14/5 = around 2.8</output>

<result>14/5 = around 2.8</result>