A rectangle has a length of (3/4)dm and a width of (1/2)dm. What is the perimeter of the rectangle?
一个长方形，长是(3/4)dm，比宽多(1/2)dm，这个长方形的周长是多少？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/4) + (1/4)</gadget>
<output>1</output>

<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<result>2</result>