What is (5/18) after subtracting (11/18) from a number?
从一个数里减去(11/18)后是(5/18)，这个数是几？
<gadget id="calculator">11 / 18</gadget>
<output>11/18 = around 0.611111</output>

<gadget id="calculator">5 / 18</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">(11/18) + (5/18)</gadget>
<output>8/9 = around 0.888889</output>

<result>8/9 = around 0.888889</result>