1. The problem is to find the value of an expression or function when $X=200$ and $Y=10$. 2. Since the original expression or function is not provided, let's assume a general form $f(X,Y)$. 3. Substitute $X=200$ and $Y=10$ into the function $f(X,Y)$ to get $f(200,10)$. 4. Without the specific function, we cannot compute a numerical answer. 5. Please provide the original function or expression to proceed with the calculation.