If a car travels from A to B, if the speed increases by 20%, it will arrive 1 hour earlier; if it travels 100 kilometers and then increases the speed by 25%, it can also arrive 1 hour earlier. rice?
一辆汽车从甲地到乙地，如果速度提高20%，就会提前1小时到达；如果行了100千米后，再提高速度25%后，也可以提前1小时到达，两地相距多少千米？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / (6/5)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

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

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/6) / (1/5)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">100 / (1/6)</gadget>
<output>600</output>

<result>600</result>