Qty rounding

Hi

I have a requirement, where I sell the materials in Kgs in sales order, which in turn calculated into bales. Now when the sales order is created for 100kgs in sales order it is converted into 4.575 bales. Now our requirement is fraction values should not be allowed. If the decimal is more than (eg. 4.575 it should round off to 5 Bales, if it is 4.375 it should become 4 bales). It is not the value it is the qty of the material which should be rounded off.

Pls. let me know where the setting needs to be done.

Thanks in advance

Regards

Aravind