The students went on an autumn outing. They traveled at a speed of 4 kilometers per hour. When they walked for (2/5) hours, they happened to walk (2/3) of the whole journey. How many kilometers is the whole journey?
同学们去秋游，他们以每小时4千米的速度前行，走了(2/5)小时的时候，正好走了全程的(2/3)，全程是多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/5) / (2/3)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">4 * (3/5)</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>