The lengths of the three sides of a triangle are (1/3) meter, (5/9) meter and (7/18) meter respectively. What is the perimeter of the triangle in meters?
一个三角形三条边的长分别是(1/3)米、(5/9)米和(7/18)米，这个三角形的周长是多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">7 / 18</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">(1/3) + (5/9) + (7/18)</gadget>
<output>23/18 = around 1.277778</output>

<result>23/18 = around 1.277778</result>