Lingling often exercises in the morning. One day, she started from her home and ran to the park. She ran for a certain distance. At this time, she was still 800 meters away from the park. She ran another third of the distance. The running distance ratio is 4:1, how far is it from her home to the park?
玲玲经常早锻炼，有一天，她从家出发向公园跑去，先跑了一段路，这时离公园还有800米，她又跑了全程的三分之一，这时已跑的和未跑的路程比是4：1，求她家到公园有多远？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/3) + (1/5)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">800 / (8/15)</gadget>
<output>1_500</output>

<result>1_500</result>