There is a square flower bed with a side length of 50 meters. Grandpa Zhang walked along the flower bed 5 times in the morning. How many meters did he walk in total?
一个正方形花坛，边长50米，早上张爷爷沿着花坛走了5圈，他一共走了多少米？
<gadget id="calculator">50 * 4 * 5</gadget>
<output>1_000</output>

<result>1_000</result>