[Solved] counting the zeros in the the factorial number, please the check the error

by

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See the doc, it should be used this way:

public BigInteger mod(BigInteger m)

public BigInteger divide(BigInteger val)

You can change it to this:

factorialans.mod(BigInteger.valueOf(10))

and

factorialans.divide(BigInteger.TEN)

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solved counting the zeros in the the factorial number, please the check the error