RtlLargeIntegerDivide

LARGE_INTEGER
    RtlLargeIntegerDivide(
        IN LARGE_INTEGER  Dividend,
        IN LARGE_INTEGER  Divisor,
        IN OUT PLARGE_INTEGER  Remainder
        );

RtlLargeIntegerDivide is exported to support existing driver binaries and is obsolete. For better performance, use the compiler support for 64-bit integer operations.