import java.util.*;
import java.lang.*;
import java.math.*;
import java.text.*;

class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		DecimalFormat df = new DecimalFormat("0E0");

		Double valorDouble =  10000000000.0;
		System.out.println(df.format(valorDouble)); // 1E10
	}
}