An isosceles triangle, the lengths of two sides are (2/3) meters and (1/4) meters respectively, find the perimeter of this triangle.
一个等腰三角形，其中两条边的长度分别是(2/3)米和(1/4)米，求这个三角形的周长．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/3) + (2/3) + (1/4)</gadget>
<output>19/12 = around 1.583333</output>

<result>19/12 = around 1.583333</result>