From city A to city B, it takes 5 hours for a truck and 6 hours for a bus. What is the sum of the speed of the truck and the speed of the bus?
从甲城到乙城，货车要行5小时，客车要行6小时，货车的速度与客车的速度和是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) + (1/6)</gadget>
<output>11/30 = around 0.366667</output>

<result>11/30 = around 0.366667</result>