用蒙特卡罗法求R椭圆面积

I need to calculate the area of the eclipse (a=6 b=3) with the Montecarlo Method. Also I have to make a plot (a diagram) of the result with the inside points red and the out ones black. At the end I have to compare the "Montecarlo result" with the "Regular Result"I need to calculate the area of the eclipse (a=