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Browse your files, and locate where you saved the ODS file. This will open your right-click options on a pop-up menu. This will open a list of your available applications in a new pop-up window, and allow you to select any one of them to open this file. If you've opened an ODS file before, a sub-menu of recommended apps may pop up when you hover over Open with. In this case, you can select an app from the list here. Excel allows you to open, view, and edit ODS files. This will open the selected ODS file in Excel.
Find the ODS file you want to open on your computer. Right-click the ODS file. Click Open with on the right-click menu. Select Microsoft Excel from the list of applications. Hit ↵ Enter or ⏎ Return on your keyboard.