Sentinel-3 scaling factor in Google Earth Engine

Does anybody know how to use the scaling factors from Google Earth Engine with Sentinel-3 dataset?

The band values provided in ee.ImageCollection("COPERNICUS/S3/OLCI" by default (GEE, orange) are integers which are very close to the official band values from ESA’s Copernicus Open Access Hub (S3, blue) (see figure). The GEE values seem to be the rounded ESA values, thus I assume the scaling factors should bring the decimal part. From my experience the decimal part can also be negative.