Convert DN L2A value to decimal values

Yesterday I’ve donwloaded L2A products from Today I’ve seen that every bands has DN values over thousands points but I expected to see decimal values. For me is the first time that I use L2A, normally I use L1C and I process this datas using Semi Automatic Classification Plugin. Unfortunatly today scihub has some problems because the search give me offline products for L1C, this is my search:

( footprint:“Intersects(POLYGON((12.461767603283823 41.907988253907234,12.490908967525352 41.907988253907234,12.490908967525352 41.92500395978885,12.461767603283823 41.92500395978885,12.461767603283823 41.907988253907234)))” ) AND ( beginPosition:[2018-07-01T00:00:00.000Z TO 2018-08-31T23:59:59.999Z] AND endPosition:[2018-07-01T00:00:00.000Z TO 2018-08-31T23:59:59.999Z] ) AND ( (platformname:Sentinel-2 AND producttype:S2MSI1C AND cloudcoverpercentage:[0 TO 5]))

Is there a procedure to obtain decimal values using SNAP?

physically, Sentinel-2 products are stored as 16 bit integer, but in SNAP they are converted to 32 bit Float [reflectance, 0-1] based on their metadata.
It is defined by the quantification_value which is 10,000.