A square square with a side length of 50 meters, Kobayashi runs along the square for 4 weeks every day, how many meters does Kobayashi run every day?
一个正方形的广场，边长50米，小林每天沿广场跑4周，小林每天大约跑多少米．
<gadget id="calculator">50 * 4 * 4</gadget>
<output>800</output>

<result>800</result>