How do I get the area of this problem?

I do my code for another problem using monte carlo simulation for the value of pi. This is not my homework. This is the previous trimester question of School. I didn't get it properly. Here is my code of value of PI.

prompt='Eneter number of trials:';
n=input(prompt);
hit = 0;
x1 = 0;
y1 = 0;
x0 = 0;
y0 = 0;
r=1;
for i = 1:n
  x1 = rand();
  y1 = rand();
  
  if ((x1-x0)^2 + (y1-y0)^2) < r^2
      hit = hit +1;
      plot(x1,y1,'g.');
  else
      hold on;
      plot(x1,y1,'r.');
  end%if end
    
end%end for loop

disp(hit);
pi= (4*hit)/n;
disp('PiValue');
disp(pi);

cx = linspace(0,1,100);
cy = sqrt(1 - cx.^2);
hold on;
plot(cx,cy);

Answer 1

[KSSV]

Refer this: https://in.mathworks.com/matlabcentral/fileexchange/33543-monte-carlo-method?focused=5201749&tab=function

[Md Jilani]

It measure the value of PI.... which I have done already. But I can't get this problem. By the way, Thanks a lot brother.

[KSSV]

For the given code...your area will be:

Area = hit/n ; 
% Original area through formula 
A = pi/4*r^2 ;