问题描述：
英语翻译
During a baseball season Andrew got a hit in 35% of his at-bats,12.5% of which were doubles.If Andrew hit 21 doubles in the season,how many at-bats did he have?
During a baseball season Andrew got a hit in 35% of his at-bats,12.5% of which were doubles.If Andrew hit 21 doubles in the season,how many at-bats did he have?
问题解答：
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