The school playground is a rectangle with a length of 35 meters and a width of 15 meters. If you run around the playground 5 times every morning, how many meters should Uncle Li walk at least every day?
学校操场是一个长方形，长35米，宽15米，如果每天早上围着操场跑5圈，李大爷每天至少要走多少米？
<gadget id="calculator">35 + 15</gadget>
<output>50</output>

<gadget id="calculator">50 * 2 * 5</gadget>
<output>500</output>

<result>500</result>