write the following in Hindu-Arabic numeral.
MCD

Answer

To convert the Roman numeral MCD into Hindu-Arabic numeral, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Roman Numerals**: The given Roman numeral is MCD.

2. **Break Down the Roman Numerals**:
- M = 1000
- C = 100
- D = 500

3. **Understand the Combination**:
- In Roman numerals, when a smaller numeral appears before a larger numeral, it is subtracted. Here, C (100) is before D (500), so we subtract C from D.
- Therefore, D - C = 500 - 100 = 400.

4. **Add the Values Together**:
- Now, we add the value of M to the result from the previous step:
- M + (D - C) = 1000 + 400 = 1400.

5. **Final Answer**: The Hindu-Arabic numeral for MCD is 1400.