Guide

1. Inside your Microsoft Excel worksheet, select a cell and then type an 'Equals' (=) sign to proceed with the computation.

2. Following that, select the cell that contains the time you wish to add and then type a 'Plus' (+) sign.

3. Type 'Time' afterwards, then enter the specific number of hours, minutes, and seconds you wish to add. Follow this format to make sure that the formula is correct: (HH,MM,SS).

4. Once done, click anywhere around the worksheet to apply the changes and run the formula.

5. After completing these steps, the results will be displayed on the selected cell. It will show the exact time after adding the specified number of hours, minutes, and seconds to the selected time data.