Find the sum.
`MMCDVII + CLVII + CIII`

Answer

To find the sum of the Roman numerals MMCDVII, CLVII, and CIII, we will first convert each Roman numeral to its corresponding Arabic numeral (the standard number system) and then add them together.

### Step 1: Convert MMCDVII to Arabic numeral
- MM = 1000 + 1000 = 2000
- CD = 500 - 100 = 400
- VII = 5 + 1 + 1 = 7

So, MMCDVII = 2000 + 400 + 7 = **2407**

### Step 2: Convert CLVII to Arabic numeral
- CL = 100 + 50 = 150
- VII = 5 + 1 + 1 = 7

So, CLVII = 150 + 7 = **157**

### Step 3: Convert CIII to Arabic numeral
- C = 100
- III = 1 + 1 + 1 = 3

So, CIII = 100 + 3 = **103**

### Step 4: Add the Arabic numerals together
Now we will add the converted values:
- 2407 (from MMCDVII)
- 157 (from CLVII)
- 103 (from CIII)

Let's add them step by step:
1. First, add 2407 and 157:
- 2407 + 157 = 2564
2. Now, add 2564 and 103:
- 2564 + 103 = 2667

### Final Result
The sum of MMCDVII + CLVII + CIII is **2667**.

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