A train departs from Shanghai to Tianjin and travels the entire distance (3/5), which is 538 kilometers away from Tianjin. How many kilometers has the train traveled?
一列火车从上海开往天津，行了全程的(3/5)，距天津还有538千米．这列火车已经行了多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">538 / (2/5)</gadget>
<output>1_345</output>

<gadget id="calculator">1_345 * (3/5)</gadget>
<output>807</output>

<result>807</result>