`0.00125 xx 200 = "_____"`.

Explanation

To solve the question \(0.00125 \times 200\), we can follow these steps:

### Step 1: Write the expression
We start with the expression:
\[ 0.00125 \times 200 \]

### Step 2: Remove the decimal
To simplify the calculation, we can convert \(0.00125\) into a fraction. Since \(0.00125\) has 5 decimal places, we can express it as:
\[ \frac{125}{100000} \]
Thus, the expression becomes:
\[ \frac{125}{100000} \times 200 \]

### Step 3: Multiply the fraction by 200
Now, we can multiply \(125\) by \(200\):
\[ 125 \times 200 = 25000 \]
So, we have:
\[ \frac{25000}{100000} \]

### Step 4: Simplify the fraction
Next, we simplify \(\frac{25000}{100000}\). We can divide both the numerator and the denominator by \(10000\):
\[ \frac{25000 \div 10000}{100000 \div 10000} = \frac{2.5}{10} = 0.25 \]

### Final Answer
Thus, the result of \(0.00125 \times 200\) is:
\[ \boxed{0.25} \]

---