presto-main/src/main/java/io/prestosql/type/RealOperators.java/RealOperators/multiply
class RealOperators:    @ScalarOperator(MULTIPLY)
    @SqlType(StandardTypes.REAL)
    public static long multiply(@SqlType(StandardTypes.REAL) long left, @SqlType(StandardTypes.REAL) long right)
    {
        return floatToRawIntBits(intBitsToFloat((int) left) * intBitsToFloat((int) right));
    }