We know trhat pi is equal to 3.14 and with pemdas we know we do the parenthasses first so 6x6 is = 36
so the equation is just 3.14 x 36 x 25 so I'm assuming you can carry on from here although pointer multiply the first too then multiply that answer by 25.....
Just use the calculator on this website.....you already typed it all in....just 'enter ' it on the calculator.....pi*6*6*25 = 2827.4333882308139146
Dude I was trying to teach something here we can't give the answer all the time It's better to point them in the right direction instead of teleporting them there I know your trying to help but I beilive his diffuculty is understanding how to multiply all three numbers it was better for him to ask here so some one may be able to explain what he needs to know.
OMG I didn't even realize it was you EP Sorry I am more enforceful to people I dont know for some reason you got to stop creeping up in problems like that XD