A car driving from East Village to West Village can arrive on time if it travels 40 kilometers per hour. If you travel 60 kilometers per hour, you can arrive 1 hour earlier than the original plan. How many kilometers is the distance from East Village to West Village?
一辆汽车从东村开往西村，如果每小时行40千米，可以按时到达．如果每小时行60千米，可比原计划提前1小时到达．东村到西村的路程是多少千米？
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/40) - (1/60)</gadget>
<output>1/120 = around 0.008333</output>

<gadget id="calculator">1 / (1/120)</gadget>
<output>120</output>

<result>120</result>