BigDecimal error

[Kadyn]

Write a code in which arithmetic operations are to be performed. Everything works right except splitting. ♪ ♪ Sends such an exception if you divide a smaller number by more:

This is the code.

public class GoMath
{
public <T extends Number> T getResultMath(T arg1, T arg2, String op)
{
    BigDecimal bigArg1 = new BigDecimal(arg1 instanceof Integer ? arg1.intValue(): arg1.doubleValue());
    BigDecimal bigArg2 = new BigDecimal(arg2 instanceof Integer ? arg2.intValue() : arg2.doubleValue());
    BigDecimal bigRes = null;
    switch (op) {
        case "/": {
            if (arg1.intValue() == 0 || arg2.intValue() == 0)
            {
                try
                {
                    throw  new DivZeroException("Неможливе ділення на 0");
                }
                catch (DivZeroException dz)
                {
                    System.out.print(dz.getMessage());
                }
            }

            bigRes = bigArg1.divide(bigArg2);
            break;
        }
        case "*": {
            bigRes = bigArg1.multiply(bigArg2);
            break;
        }
        case "+": {
            bigRes = bigArg1.add(bigArg2);
            break;
        }
        case "-": {
            bigRes = bigArg1.subtract(bigArg2);
            break;
        }
    }
    if(arg1 instanceof Integer && arg2 instanceof Integer)
    {
        return (T) new Integer(bigRes.intValue());
    }
    if(arg1 instanceof Integer && arg2 instanceof Integer && arg1.intValue() < arg2.intValue() && op.equals("/"))
    {
        return (T) new Double(bigRes.doubleValue());
    }

    return (T) new Double(bigRes.doubleValue());

}

}

in main :

public class RunTet

{

public static void main(String[] args)

{

Number a = 6, b = 7;

   GoMath gm = new GoMath();
   System.out.print(gm.getResultMath(a, b, "/"));



}

}

The result is a mistake:

Error text:
Exception in thread "main" java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result.
at java.math.BigDecimal.divide(BigDecimal.java:1690)
at math_action_realization.GoMath.getResultMath(GoMath.java:30)
at math_action_realization.RunTet.main(RunTet.java:12)

How can you fix that?

[kalena]

In the BigDecimals, please indicate how to round up in the method .divide(...). Otherwise, ArithmeticException may be obtained if there is no precise rounded result, e.g. 1/3. Thus, it is always necessary to:

a = b.divide(c, decimals, rounding);