Xiaohua goes from home to the station, the whole journey (8/9) is the post office, he walks from the station to home, and the distance (1/3) of the journey is 0.42 kilometers past the post office. How many kilometers is Xiaohua's home from the station?
小华从家去车站，行到全程的(8/9)处是邮局，他从车站往家走，行到全程的(1/3)的地方已超过邮局0.42千米．小华家距车站多少千米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">1 - (8/9)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/3) - (1/9)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">0.42 / (2/9)</gadget>
<output>1.89</output>

<result>1.89</result>