Subtract (1/3) from (4/5), add the difference to (1/6), what is the sum?
从(4/5)里减去(1/3)，所得的差与(1/6)相加，和是多少？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(4/5) - (1/3)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(7/15) + (1/6)</gadget>
<output>19/30 = around 0.633333</output>

<result>19/30 = around 0.633333</result>