square square with a side length of 80 meters, Guo Sanxin runs 2 laps along the square every day, how many meters does Guo Sanxin run every day?
一个正方形的广场，边长80米，郭三新每天沿广场跑2圈，郭三新每天跑多少米．
<gadget id="calculator">80 * 4 * 2</gadget>
<output>640</output>

<result>640</result>