how many airports are in Italy?
select count(*) from airports where country = 'Italy'
show the info of routes listing those airports as destinations.
select * from routes as t1 join airports as t2 on t1.dst_apid = t2.apid where t2.country = 'Italy'
count the total number.
select count(*) from routes as t1 join airports as t2 on t1.dst_apid = t2.apid where t2.country = 'Italy'