Can you lose weight by walking 3 miles a day?

Sure, here's a description in English with a questioner's tone, keeping the word count to around 300 words: "So, I've been hearing a lot about the benefits of walking for weight loss, and I'm curious about whether or not it's truly effective. Specifically, I'm wondering if I can lose weight by walking 3 miles a day. Is this a realistic goal, and if so, how long would it take to see results? I understand that weight loss is a complex process that involves diet and exercise, but I'm hoping that adding walking to my daily routine can help me make progress. I've heard that walking is a low-impact exercise that can improve cardiovascular health and burn calories, but I'm not sure if 3 miles a day is enough to make a difference. I'm also curious about any other factors that might impact the effectiveness of walking for weight loss, such as my age, weight, and overall fitness level. Can you provide any insight into how these factors might play a role in determining whether or not I can lose weight by walking 3 miles a day?