The runway of the school playground consists of two opposite sides of a square (side length 50m) and two semicircles. Xiaochen ran 5 laps on the playground, how many meters is the total?
学校操场的跑道由正方形的两条对边(边长50m)和两个半圆组成．小晨在操场上跑了5圈，一共是多少米？
<gadget id="calculator">3.14 * 50</gadget>
<output>157</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">157 + 100</gadget>
<output>257</output>

<gadget id="calculator">257 * 5</gadget>
<output>1_285</output>

<result>1_285</result>