To set value to cell data

Hi,
I have a question,

Working with Google calculator by parameterizing ,

How to set the actual result value into the excel from @Test? i.e i have passed the expected result from the excel @dataprovider and calculated the actual result @test.

Now i have my actual result @Test.
how to use xls reader file to setcelldata? in to the excel file.

Please do the needful.

TIA,
Nithya.