12 interest is the interest rate = 12%.

According to the formula, interest = principal * interest rate.

Take ten thousand principal as an example,

Interest =10000 *12% =1200 (yuan)

Extended data:

Interest = interest product × daily interest rate

Interest (year) = principal × annual interest rate (percentage) × deposit period

Or interest = principal × interest rate× time

Deposit interest = principal x days x listing interest (daily interest rate) = interest-bearing days x daily interest rate

Interest tax = deposit interest (income tax payable) × applicable tax rate

The amount of interest depends on three factors: principal, deposit period and interest rate level.

The calculation formula of interest is: interest = principal x interest rate x deposit term.

According to People's Republic of China (PRC) State Taxation Administration of The People's Republic of China Guoshuihan [2008] No.826, since June 9, 2008, personal income tax on savings deposit interest is temporarily exempted, so the interest tax on savings deposit interest is temporarily exempted at present.

Multiplication algorithm

1, integer

(1) Multiplies the first factor by the number on each bit of the second factor from the cell;

(2) Multiply by the number on the second factor, and the last digit of the number is aligned with the second factor;

(3) adding the multiplied numbers for multiple times;

2. Decimals

(1) Find the product first according to the law of integer multiplication;

(2) Look at a factor * * *, how many decimal places there are, and count the decimal points from the right side of the product;

Step 3 score

(1) Fractions are multiplied by fractions, the product of numerator multiplication is numerator, and the product of denominator multiplication is denominator;

(2) If there is an integer, treat it as a false fraction with the denominator of 1;

(3) If you can cut the point, cut the point first.