Mac Forums

ok so i just got a mac a few days ago and i love it.
before this i used to have a pc and i had all my word and powerpoint programs on there. is there anyway i can download my Microsoft office 2007 program on here. like i have the CD and everything for it and it was very expensive so i was wondering if i could just instal it or would i have to do something first.
thank you so much in advance
please answer as soon as possible
ASAP