converting rods into acres

Hello,
I am looking for someone to tell me how many acres is in the following piece of property. The property description states:

Commencing at a point on the Section line 71 rods West of the Northeast corner of the NW 1/4;
thence West along the Section line 35 rods;
thence South 21 rods, more or less to the center of the road;
thence Southeasterly 38 rods, more or less, along the center of the said road;
thence North 36 rods, more or less, to the point of the beginning.

Thank you and I would like to know how you did it? The conversion to do it. I could not find how to do a polygram on the web.
Thank you,
bschjone@tds.net

[Robert Fogt]

Is there only the description? I could do it from a picture, labled in rods. But the description seems overly complex and cryptic.