I would like to translate your query in English for the convenience of other readers- Solutions related to calculation of interest on capital.

Since you have not mentioned any particular investment for the interest calculation on capital, I am discussing a general calculation method.

Interest on capital = Amount of capital x Rate of interest

Example-

Capital- 50,000

Interest Rate- 5%

Interest on the capital = 50,000 x 5/100 = ₹ 2,500.