A cell shows 24. Typing 25 over it seems like a small correction, but the cell may contain a formula rather than a fixed number. The visible result does not tell the whole story.
Inspect before replacing
Select the cell and examine its formula in the application’s formula bar. In a practice sheet, enter 6 in A1, 4 in B1 and =A1*B1 in C1. C1 displays 24, yet its underlying content describes a calculation. Microsoft’s formula overview explains this relationship.
Decide what actually needs correction
If the source quantity is wrong, changing the source may be appropriate. Replacing the result with a typed number breaks that particular calculation. First understand the sheet’s purpose and avoid experimenting directly in a shared operational workbook.
In your practice example, change A1 to 7 and observe C1. Then replace C1 with a fixed number and repeat. The contrast makes a useful habit concrete: inspect how a value is produced before treating its display as an ordinary text field.