(6/7)*(5/6)=how much.
(6/7)*(5/6)=多少．
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(6/7) * (5/6)</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>