The ROUND function will let you round your cells to the nearest decimal place of your choosing. Learn how to do so with two methods.
The first technique is to use the function =ROUND(Cell).
This will round your numbers to the nearest ones place.
From there you can simply click and drag the function throughout all of your numbers
From there simply click and drag the function throughout the rest of your column.
In the example above, =ROUND (B6, -3) means that you will round 1325.343 to the nearest 10^3 spot, meaning increments of 1000. That being said, the yield of cell C6 will be 1000.
If I wrote =ROUND (B6,2) that would round the number to the nearest hundredths place (10^-2). That would be 1325.34
one final honorable mention would be the round up/down tools in the top menu toolbar. the one on the left removes decimals, while the one to to right adds decimals.
It will have the same effect as those previous functions, and I personally prefer it, because it is way quicker and easier than the other two. Also, make sure that you highlight all of the cells that you want to round up or down.
And there you have it; that is how you round numbers in Google Sheets.