Data import error in R [closed]

Hello! I minded a base I ordered via LAI for R. I was sent in excel, but I converted to csv by work facilities. I know that by transforming all the data from the columns of "character" to "numeric", one of them gets the values multiplied by 1000. If I transform to "integer", this problem does not happen and I'm thinking of working with the base like this. This does not occur when I import the same data into excel, all columns remain with the same values they were when in character ... What can it be?