When Xiaofang went from home to school, when she walked to the Children's Palace, she just walked the whole journey from home to school (4/7); when she came home from school, Xiaofang returned from the same road, and she went to the Children's Palace and continued to move forward After walking 60 meters, it is exactly half of the whole journey. How many meters is it from Xiaofang's home to the school?
小芳从家到学校，当她走到少年宫时，刚好走了从家到学校全程的(4/7)；放学回家时，小芳从原路返回，她走到少年宫后又继续向前走了60米，此时正好是全程的一半．小芳家到学校有多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) - (3/7)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">60 / (1/14)</gadget>
<output>840</output>

<result>840</result>