Answer
Equivalent Hindu-Arabic numeral is 653.
Work Step by Step
Equivalent Hindu-Arabic numeral of each of the Greek numeral is
\[\begin{array}{*{35}{l}}
\chi =\text{ }600 \\
\nu =\text{ }50 \\
\gamma =\text{ }3 \\
\end{array}\]
Add these numbers gives equivalent Hindu-Arabic numeralas653.