My sister ran 3 laps around a square flower bed with a side length of 50 meters. How many meters did my sister run in total?
姐姐绕边长是50米的正方形花坛跑了3圈，姐姐一共跑了多少米．
<gadget id="calculator">50 * 4 * 3</gadget>
<output>600</output>

<result>600</result>