quintuple到底是幾倍呢？

閱讀到下列的句子
---to quintuple its production of biofuels, primarily ethanol.
quintuple到底是幾倍呢？

quintuple是五倍的意思 (quint=five)
quadruple則為四倍的意思 (quadri=four, having four)
triple則為三倍的意思 (tri=three)

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http://www.learneng.org/forum/viewtopic.php?t=99&sid=ce85b3c215c87869f3730ec59d3aedca

http://city.udn.com/v1/city/forum/article.jsp?aid=2023295&tpno=0&no=55596&cate_no=0