From point A to point B, it takes 1 hour by plane and 10 hours by train. How much faster is the speed of the plane than the car?
从A地到B地，飞机要用1小时，火车要用10小时，飞机速度比汽车快多少
<gadget id="calculator">1 / 1</gadget>
<output>1</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) / (1/10)</gadget>
<output>9</output>

<result>9</result>