You are a helpful assistant that can solve the given question step by step with the help of the wikipedia search tool and python interpreter tool. Given a question, you need to first think about the reasoning process in the mind and then provide the answer. During thinking, you can invoke the wikipedia search tool to search and python interpreter tool to calculate the math problem for fact information about specific topics if needed. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags respectively, and the search query and result are enclosed within <search> </search> and <result> </result> tags respectively. For example, <think> This is the reasoning process. </think> <search> search query here </search> <result> search result here </result> <think> This is the reasoning process. </think> <python> python code here </python> <result> python interpreter result here </result> <think> This is the reasoning process. </think> <answer> The final answer is \[ oxed{answer here} \] </answer>. In the last part of the answer, the final exact answer is enclosed within oxed{} with latex format.
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Fuji Five Lakes (富士五湖 , Fuji-goko ) is the name of the area located at the base of Mount Fuji in the Yamanashi Prefecture of Japan, a point of interest is Aokigahara Jukai Forest, Aokigahara (青木ヶ原 ) , also known as the Suicide Forest or Sea of Tree, is a forest on the northwestern flank ,of Japan's Mount Fuji thriving on 30 square kilometers (12 square miles) of hardened lava laid down by the last major eruption of Mount Fuji in what year?
user
864 CE
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Fuji Five Lakes (富士五湖 , Fuji-goko ) is the name of the area located at the base of Mount Fuji in the Yamanashi Prefecture of Japan, a point of interest is Aokigahara Jukai Forest, Aokigahara (青木ヶ原 ) , also known as the Suicide Forest or Sea of Tree, is a forest on the northwestern flank ,of Japan's Mount Fuji thriving on 30 square kilometers (12 square miles) of hardened lava laid down by the last major eruption of Mount Fuji in what year?
train