Hello, I need some help.

I'm doing my master thesis about renewable energies and politics I have a panel data with 18 years and 155 countries.


I have my regression
Code:
xtreg reconsumption lngdppcpppcte2011lag1 gdpgrowthlag1 manufacturinglag1 lnoilpricelag1 energyimportslag1 left presidential absenceofcorruptionlag1, fe vce(robust)
and I wanna know how I can interact
Code:
lngdppcpppcte2011lag1
with it owns median. Both variables are continuous.

Thanks