Calculate the due interest earned by a principal (initial amount of money lent, deposited or borrowed) of 2,000,000,000 units (Dollar, Euro, Pound, etc.), from date: Apr 5, 2019, to date: May 5, 2049, namely for a period of 10,988 days (361 Months), with an annual simple flat interest rate of 34% if the commission fee (withdrawal or payment) is 0%.

Principal (initial amount), P = 2,000,000,000


Annual simple interest rate, R = 34%


From date: Apr 5, 2019


To date: May 5, 2049


Duration, T = 10,988 days (361 Months)


Commission fee (withdrawal or payment), F = 0%


No. of days in a year, N = 365


I = Simple interest:

I = (P × R × T) ÷ N =


(2,000,000,000 × 34% × 10,988) ÷ 365 =


(2,000,000,000 × 34 × 10,988) ÷ (365 × 100) =


747,184,000,000,000 ÷ 36,500 ≈


20,470,794,520.547945205479 ≈


20,470,794,520.55

B = Amount earned:

B = P + I =


2,000,000,000 + 20,470,794,520.547945205479 =


22,470,794,520.547945205479 ≈


22,470,794,520.55

Signs: % percent, ÷ divide, × multiply, = equal, ≈ approximately equal;

Writing numbers: comma ',' as thousands separator; point '.' as a decimal mark;

Calculate simple flat rate interest on a principal borrowed, lent

Simple flat rate interest = (Principal × Annual simple flat interest rate × Duration in days) ÷ Number of days in a year

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