Xiao Ming ran 4 laps along the playground, and it took 5 minutes. It is known that Xiao Ming runs 160 meters per minute, so what is the perimeter of the playground in meters?
小明沿着操场跑了4圈，用了5分钟，已知小明每分钟跑160米，那么操场的周长应是多少米．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">160 * (5/4)</gadget>
<output>200</output>

<result>200</result>