[Python] Python pandas : Merge two tables without keys (Multiply 2 dataframes with...

I want to merge 2 dataframes with broadcast relationship: No common index, just want to find all pairs of the rows in the 2 dataframes. So want to make N row dataframe x M row dataframe = N*M row dataframe. Is there any rule to make this happen without using itertool?

DF1=
id quantity
0 1 20
1 2 23

DF2=
name part
0 'A' 3
1 'B' 4
2 'C' 5

DF_merged=
id quantity name part
0 1 20 'A' 3
1 1 20 'B' 4
2 1 20 'C' 5
3 2 23 'A' 3
4 2 23 'B' 4
5 2 23 'C' 5

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