If a car travels from A to B, if it travels 45 kilometers per hour, it will arrive 1 hour late; if it travels 50 kilometers per hour, it will arrive 1 hour earlier. What is the distance in kilometers between A and B?
一辆汽车从甲地到乙地，如果每小时行驶45千米，就要延误1小时到达；如果每小时行驶50千米，就可提前1小时到达．则甲乙两地的距离是多少千米？
<gadget id="calculator">45 + 50</gadget>
<output>95</output>

<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<gadget id="calculator">95 / 5</gadget>
<output>19</output>

<gadget id="calculator">19 + 1</gadget>
<output>20</output>

<gadget id="calculator">45 * 20</gadget>
<output>900</output>

<result>900</result>