Increcte QTY for the parts in the subassembly if you have more than 2 pieces of that subassembly.

I am trying to create a BOM for my project in an indented type with detailed numbering. Under the top assembly, there is a subassembly (item 3) with QTY of 2. The QTY of all parts inside the that subassembly (item 3.1, item 3.11, item 3.2 ......) should be 2 x the QTY in each subassembly. But when I generated the BOM, it only give the QTY of all parts inside the that subassembly (item 3.1, item 3.11, item 3.2 ......) for one subassembly, which is not right. Is there a way to solve the problem?

thanks.

SolidworksBill Of Materials