If i have an input tag where I can input numbers and i would want a input value of 1 add 1 day to a date.

example 1: Current date = 26/11/2021 Start of next month date = 01/12/2021 Now I input value of 1 day then i want 01/12/2021 to change to 02/12/2021

Then if i input value of 2 days then i want 01/12/2021 to change to 03/12/2021

Then if i input value of 3 days then i want 01/12/2021 to change to 04/12/2021 etc....

example 2: Current date = 26/11/2021 Start of next month date = 01/12/2021 Now I input value 1 month then i want 01/12/2021 to change to 01/01/2022

Then if i input value 2 month then i want 01/12/2021 to change to 01/02/2022

Then if i input value 3 month then i want 01/12/2021 to change to 01/03/2022 etc...

Basically to determine the Date where the input value of either number of days and/or months