God will often do that (answer prayer and meet your needs) - He OFTEN provides even MORE for YOU than what you gave for HIM!
The other week, I don't even remember what I gave, but remember that I was broke as a result (which is pretty much the norm for me). I didn't mind, because it's just "stuff" and I know that doing it provides blessings to others (things I already HAVE and take for granted).
Afterward, I received $42 tickets for an amazing concert for only $10 and FREE front row tickets to the OPERA! You CAN trust HIM! He provides always!