<prompt> Translate the following text to EnglishKwa mfano, kwa njia ya riba ya amortization, kiasi cha riba sawa na thamani ya uhifadhi wa uwekezaji mara kiwango cha riba cha ufanisi kinahesabiwa kwa kila kipindi cha uhasibu.  <response>: INTEREST METHOD - 1 Under the interest method of amortization, an amount of interest equal to the carrying amount of the investment times the effective interest rate is calculated for each accounting period. 