(2/7) ten (5/7) = how much
(2/7)十(5/7)=多少
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(2/7) + (5/7)</gadget>
<output>1</output>

<result>1</result>