The length of the base of an isosceles triangle is (2/5) decimeters, and the length of one side is (3/4) decimeters. What is the perimeter of this isosceles triangle?
一个等腰三角形的底边长(2/5)分米，一条腰长(3/4)分米，这个等腰三角形的周长是多少？
<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 / 10</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/5) + (3/2)</gadget>
<output>21/10 = around 2.1</output>

<result>21/10 = around 2.1</result>