The father and son went from home to the park, and they ran forward at the same time. When the father ran 1/5 of the distance, the son only ran 15% of the distance. When the son ran another 600 meters, the father just arrived at the park. How far is the home from the park?
父子二人从家到公园，他们同时跑步前进，当父亲跑完全程的(1/5)时，儿子只跑完全程的15%．当儿子再跑600米后，父亲恰好到达公园．家离公园有多远？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 600</gadget>
<output>120</output>

<gadget id="calculator">120 / 0.15</gadget>
<output>800</output>

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

<gadget id="calculator">800 / (4/5)</gadget>
<output>1_000</output>

<result>1_000</result>