/* package whatever; // don't place package name! */
 
import java.math.*;
 
/* 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
	{
		BigDecimal value = BigDecimal.valueOf(3.11).multiply(BigDecimal.valueOf(3.11));
		value = value.multiply(BigDecimal.valueOf(100)).setScale(0, RoundingMode.HALF_UP).divide(BigDecimal.valueOf(100));
		System.out.println(value.doubleValue());
	}
}

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