Need help with math

Trying to find the square root of the equation on this calculator. (picture of calculator posted below)

The calculator gives me an answer of 55537.81
(Because I have no idea what I'm doing)


Material I'm reading gives me an answer of 235.7

What buttons on this calculator need I push to get the correct answer of 235.7?

Thanks in advance!

 

Thank you very much Gentlemen!

 

Remember when we had to do this shit by hand, when calculators in class was not allowed? "Show the work"? Oh, the old days. The makers of men.

 

Apparently not.... I was wrong.
But it popped into my mind for some reason.
Deleted.
Use that key Max pointed out.

 

Yes indeed, the symbol Maxinger referred to was the Key.

 

What confused me was rounding it up to a decimal.
(Damn, I'm getting old)

 

Dude, you drag down the average IQ by good measure. Why did your dad not wear a condom?

 

Your dad and his dad are the same dad, different Moms.

 

Can't be, even my grand grand dad, was he still alive, would recognize the square root symbol. One can't possibly be that stupid. Must be an Australian joke of sorts, ain't it mate? ;-)