@obsidian
#alt4you (feel free to edit the post and add the (alt) text to the image itself):

An Obsidian Base table shows a cursor clicking the Months column header and opening a context menu with the Edit formula option highlighted. A Formula dialog appears with a formula field displaying ((now)) - acquired).months).round(). The expression is built in stages: first now() to get the current date, then - acquired to calculate the time since the Acquired date, then .months to convert the result to a decimal number of months, and finally round() wrapping the entire expression to round it to the nearest whole number. The Months column in the table updates to show the final integer values for each row.