A rectangular flower bed is 35 meters long and 15 meters wide. Grandpa Li runs 4 laps around the flower bed every morning during his morning exercises. How many meters does Grandpa Li run every day?
一个长方形花坛，长35米，宽15米．李爷爷每天晨练时绕花坛跑4圈．李爷爷每天跑多少米？
<gadget id="calculator">35 + 15</gadget>
<output>50</output>

<gadget id="calculator">50 * 2 * 4</gadget>
<output>400</output>

<result>400</result>