Equate the digits of both the numbers by prefixing imaginary Zeroes in front, and start counting upwards.
In this case, 0 2 8
+ 1 6 5
--------
2.
While summing the digits, place a dot on the previous digit for whichever digit caused the count greater than 10, and continue counting by removing the Ten's place.
In this case, 0 2o8
+ 1 6 5
--------
3
3.
While counting consider the dots in the column as an ekādhika, or +1.
In this case, 0 2o8
+ 1 6 5
--------
1 9 3, which is the answer!
For example: HTML code link: https://www.upavidhi.com/sutra/ekadhikena-purvena#:~:text=28%20%2B%20165,for%20something%20like%3A
0 2 8
+ 1 6 5
--------
0 2o8
+ 1 6 5
--------
3
0 2o8
+ 1 6 5
--------
1 9 3, which is the answer!