There are three wires, red, yellow, and black. The red wire is (4/5) meters longer than the yellow wire, and the black wire is (1/3) meter shorter than the yellow wire. How many meters is the difference between the red wire and the black wire?
有红，黄，黑三根电线，红电线比黄电线长(4/5)米，黑电线比黄电线短(1/3)米，红电线与黑电线的相差多少米？
<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>17/15 = around 1.133333</output>

<result>17/15 = around 1.133333</result>