Grandma ran 4 times around a square flower bed with a side length of 5 meters. How many meters did she run in total?
奶奶围着边长是5米的正方形花坛跑了4圈，她一共跑了多少米．
<gadget id="calculator">5 * 4 * 4</gadget>
<output>80</output>

<result>80</result>