Show how to find the APR without Excell.

I plan to retire in 9 years, and I've estimated that I need to have $3.2 million in retirement savings on my retirement day. I currently have $1.4 million in my retirement account. Assuming that I put $1,000 per month into my retirement, what is the necessary return on my investments (APR) in order to have $3.2 million saved by my retirement date