There is a rectangle whose length is (3/4)m and width is (3/7)m. What is the circumference?
有一个长方形，长是(3/4)m，宽是(3/7)m．周长是多少？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/4) + (3/7)</gadget>
<output>33/28 = around 1.178571</output>

<gadget id="calculator">(33/28) * 2</gadget>
<output>33/14 = around 2.357143</output>

<result>33/14 = around 2.357143</result>