Xiaohong walks 2km on foot, and there is a sign at every (1/5)km. When Xiaohong reaches the fifth sign, how many kilometers does she walk exactly?
小红徒步行走2km，每(1/5)km处有一个标志，小红走到第5个标志时，正好步行了多少km．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) * 4</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>