Wang Hong takes the train from her home to the train station. If she walks 4 kilometers per hour, she is still 1 kilometer away from the station when the train leaves. If she walks 5 kilometers per hour, she will have to wait 12 minutes before getting on the train at the station. How many kilometers is Wang Hong's house from the railway station?
王红从家到火车站乘火车，如果每小时走4千米，火车开时她还离车站1千米，如果每小时走5千米，到了车站还要等12分才上车．王红家离火车站多少千米．
<gadget id="calculator">12 / 60</gadget>
<output>1/5 = around 0.2</output>

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

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

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

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

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>