I am not sure I understand what you are asking for. Can you tell us what numbers would be multiplied or divided together?
What you are saying sounds a little like "Ratio to Global Standards". When you have peptides in your sample that were spiked in at a known amount, or which happen to be present in biological samples at constant amounts, you can right-click on those peptides in Skyline and say "Set Standard Type > Global Standard". Then, when you ask Skyline to use the normalization method "Ratio to Global Standards", Skyline will divide the peptide peak areas by the sum of the global standard peak areas in that Replicate.
In general, Skyline does not have any features for comparing the peak areas of different peptides to each other. Any comparisons like that would need to be done in a different tool like Excel, where you would have control over how the calculations are done.
If you want to learn more about exporting data from Skyline for use by other tools such as Excel, you can take a look at the Custom Reports tutorial: