A car travels 12.8 kilometers in 8 minutes, and a bus travels 14.4 kilometers in 12 minutes. Who is faster? How much faster?
小汽车8分钟行12.8千米，公共汽车12分钟行14.4千米，谁的速度较快？快多少？
<gadget id="calculator">12.8 / 8</gadget>
<output>1.6</output>

<gadget id="calculator">14.4 / 12</gadget>
<output>1.2</output>

<gadget id="calculator">1.6 - 1.2</gadget>
<output>0.4</output>

<result>0.4</result>