Final answer:
The solution for the Roman numeral MMDCLXVI to Hindu-Arabic numeral is 2666.
Step-by-step explanation:
To convert the Roman numeral MMDCLXVI to Hindu-Arabic numeral, we need to assign numerical values to each Roman numeral symbol. In the Roman numeral system, M represents 1000, D represents 500, C represents 100, L represents 50, X represents 10, V represents 5, and I represents 1. When we add up the values of all the symbols, MMDCLXVI equals 1000 + 1000 + 500 + 100 + 50 + 10 + 5 + 1, which equals 2666.