Salesforce field takes only int values

I have a field that takes only int values but the data erad from the excel files is returned as a decimal as such(zip code 92122.0)

common.enterDetailsTextBox(input, output, "newCustomer.MailingZip/PostalCode", input.get("MailingZip/PostalCode"));

the input.get("MailingZip/PostalCode") method within the parameter returns a decimal value from execl as 92122.0

but my common method enterDetailsTextBox() takes parameters as such enterDetailsTextBox(DataRow input, DataRow output,String field, String value)

how do I convert the decimal value received from get to Int but still pass it as a string to my common method?

Thanks!