The school organized a spring outing for fourth-grade students and packed two large vans to start from the school. The speed of the first car is 30 kilometers per hour, and it starts at 7:00 in the morning, and the second car drives 1 hour later, with a speed of 40 kilometers per hour. As a result, two cars arrived at the same time, and asked how far the scenic spot for the spring outing was from the school?
学校组织四年级学生春游，包了两辆大面包车从学校出发．第一辆车速每小时30千米，上午7：00出发，第二辆晚开1小时，速度是每小时40千米．结果两辆车同时到达，问春游的景区离学校多远？
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/30) - (1/40)</gadget>
<output>1/120 = around 0.008333</output>

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

<result>120</result>