```python
def jpy_converter(amount_jpy, exchange_rate):
"""
将日币换算成其他货币。
:param amount_jpy: 需要换算的日币金额
:param exchange_rate: 汇率（1 JPY = exchange_rate）
:return: 换算后的金额
"""
return amount_jpy exchange_rate
示例：假设当前汇率为1 JPY = 0.009 USD
exchange_rate_usd = 0.009
用户输入日币金额
amount_jpy = float(input("请输入日币金额（JPY）："))
换算成美元
amount_usd = jpy_converter(amount_jpy, exchange_rate_usd)
print(f"{amount_jpy
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