如何将属于不同data.frame的相同名称的列相乘

I am having a problem... I have two data. frames with a lot of columns and these two data.frames are of different length, in fact one has many rows and second data.frame has only one row.... But in both data frames there are columns of same names. Now, I want to multiply the matching columns with each other. I fail to solve it. Please help me.I am having a problem... I have two data. frame