A train travels from A to B. 450 kilometers have been traveled, and the remaining distance is less than the completed distance (1/5), how many kilometers is the distance between A and B?
一列火车从甲地开往乙地．已经行了450千米，剩下的路程比已行的路程少全程的(1/5)，甲、乙两地之间的路程是多少千米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">450 / (2/5)</gadget>
<output>1_125</output>

<result>1_125</result>