Hey there!
So, we know that square has four equal sides.
For a square, area can be represented in an equation as length*width, or Side^2.
I will use the later one.
We just need to square everything in 3 2/7.
3^2= 9
2^2=4
7^2= 49
The answer is 9 4/49.
I hope this helps!
~kaikers