A 400-meter circular runway, each runway is 1.25 meters wide. Athletes are running a 200-meter race on this track. What is the distance between the starting lines of two adjacent lanes?
一个400米的环形跑道，每条跑道宽1.25米．运动员们在这条跑道上进行200米赛跑，相邻两道的起跑线应相距多少米．
<gadget id="calculator">3.14 / 2</gadget>
<output>1.57</output>

<gadget id="calculator">1.25 * 2 * 1.57</gadget>
<output>3.925</output>

<result>3.925</result>