This package gives you 13,000 Gems in total. The +73% bonus is already included in that 13,000 - you will not receive 13,000 Gems and then an extra 73% on top.
What You Get
13,000 Gems in total, added straight to your account
That total is made up of 7,500 base Gems + 5,500 bonus Gems (the +73% bonus)