Make a rectangular frame with iron wire, the length is (3/4)dm, the width is (5/8)dm, how much dm iron wire is used to make this rectangle.
用铁丝做一个长方形框架，长(3/4)dm，宽(5/8)dm，做这个长方形要用多少dm铁丝．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(3/4) + (5/8)</gadget>
<output>11/8 = around 1.375</output>

<gadget id="calculator">(11/8) * 2</gadget>
<output>11/4 = around 2.75</output>

<result>11/4 = around 2.75</result>