Converting from coefficient to numerical without decimal loss in R

Question

I know that similar questions were asked before, but I can’t find a way to convert the coefficient to a numeric one without losing any of the decimal places.

Here is a quick example:

My vector is as follows:

january$pickup_latitude[1] = 40.751231

after execution:

as.numeric(as.character(january$pickup_latitude))

result:

january$pickup_latitude[1] = 40.75123

Is there a way to keep all decimal places, even if each case has a different length?