Save numeric fiedl in sqlite with delphi 7

[systronic]

please what am I doing wrong? I have a sqlite database 3 with Delphi 7, and I use a ztable for a sales table. The problem is that I can only save in numeric fields use the StrToFloatDef () function, and I do not understand it, because there in the structure the field is NUMERIC (10,4). Can someone help me?