four times as much
From LSJ
ὁ γὰρ μανθάνων κιθαρίζειν κιθαρίζων μανθάνει κιθαρίζειν → he who is learning the harp, learns the harp by harping
English > Greek (Woodhouse Extra)
τετράκις τοσοῦτος, τετραπλάσιος
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