person went on a spring outing from home alone and covered half of the distance in 30 minutes. At this time, he accelerated his speed and traveled 50 meters more per minute than before. After another 20 minutes of riding, he was still 2 kilometers away from reaching his destination. Do you know the distance from his family to the spring outing?
一个人从家去春游，用30分钟行完了一半路程，这时他加快了速度，每分钟比原来多行50米，又骑了20分钟后，他还差2千米就到达目的地了，你知道他家到春游地点的路程吗？
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">50 * 20</gadget>
<output>1_000</output>

<gadget id="calculator">2_000 + 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 30</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/60) * 20</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">3_000 / (1/6)</gadget>
<output>18_000</output>

<result>18_000</result>