From A to B, it takes 12 hours for a bus and 16 hours for a truck. How much faster is the speed of the bus than the speed of the truck?
从甲地到乙地，客车要行12小时，货车要行16小时，客车的速度要比货车的速度快多少
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(1/12) - (1/16)</gadget>
<output>1/48 = around 0.020833</output>

<gadget id="calculator">(1/48) / (1/16)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>