A car originally planned to drive from place A to place B within a certain period of time. If it travels 45 kilometers per hour, it will be delayed by 1 hour; if it travels 50 kilometers per hour, it will arrive 1 hour earlier. How many miles is the distance between A and B?
一辆汽车原计划用一定的时间从甲地开往乙地，如果每小时行驶45千米，将延误1小时到达；如果每小时行驶50千米，可提前1小时到达．甲、乙两地的路程是多少千米？
<gadget id="calculator">50 * 1</gadget>
<output>50</output>

<gadget id="calculator">45 * 1</gadget>
<output>45</output>

<gadget id="calculator">50 + 45</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>18</output>

<gadget id="calculator">50 * 18</gadget>
<output>900</output>

<result>900</result>