/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		System.out.print(getMultAllElemIntArray(new int[]{-1,-2,3}));
	}
 
	static double getMultAllElemIntArray(int[] intArray) {
		double res = 1;
		for(int tmp : intArray) res *= tmp;
		return res;
	}
}

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