Russian-English translations for логарифм

• log
  They walked across the stream on a fallen log.
  to log the miles travelled by a ship
  To multiply two numbers, add their logs
• logarithm
  For a currency which uses denominations of 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, etc., each jump in the base-10 logarithm from one denomination to the next higher is either 0.3010 or 0.3979.