Participate in winter long-distance running competitions. Set up a service station every 500 meters from the starting point. How many meters did Duoduo run when he saw the 5th service station?
多多参加冬季长跑比赛．从出发点开始每隔500米设一个服务站．当多多看到第5个服务站时，他跑了多少米？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 / 1_000</gadget>
<output>1/250 = around 0.004</output>

<gadget id="calculator">500 * (1/250)</gadget>
<output>2</output>

<result>2</result>