Xiao Ming and Xiao Liang are running on a 200-meter circular track. It takes Xiao Ming 40 seconds to run a circle. They start from the same place at the same time and run in the same direction. When Xiao Ming catches up with Xiao Liang for the first time, he runs 500 meters. What is the speed in meters per second?
小明和小亮在200米环形跑道上跑步，小明跑一圈用40秒，他们从同一地点同时出发，同向而跑，小明第一次追上小亮时跑了500米，求小亮的速度是每秒多少米？
<gadget id="calculator">500 / 200</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) - 1</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(5/2) * 40</gadget>
<output>100</output>

<gadget id="calculator">(3/2) / 100</gadget>
<output>3/200 = around 0.015</output>

<gadget id="calculator">200 * (3/200)</gadget>
<output>3</output>

<result>3</result>