A car drives from place A to place B. If the speed is increased by 20%, it can arrive 1 hour earlier than the original time; arrive at B in hours. How many kilometers are there between A and B?
一辆汽车从甲地开往乙地，如果把车速提高20%，那么可比原定时间提前1小时到达；如果以原速行驶100千米后，再将速度提高30%，那么也可以提前1小时到达乙地．甲、乙两地相距多少千米？
<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">13 - 10</gadget>
<output>3</output>

<gadget id="calculator">3 / 13</gadget>
<output>3/13 = around 0.230769</output>

<gadget id="calculator">1 / (3/13)</gadget>
<output>13/3 = around 4.333333</output>

<gadget id="calculator">6 - (13/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">100 / (5/3)</gadget>
<output>60</output>

<gadget id="calculator">60 * 6</gadget>
<output>360</output>

<result>360</result>