#include <stdio.h>
#include <stdint.h>
union floatbit {
	float value;
	struct {
		uint32_t mant : 23;
		uint32_t exp : 8;
		uint32_t sign : 1;
	} bit;
} f;

float mult4(float f) {
	union floatbit tmp;
	tmp.value = f;	
	tmp.bit.exp += 2;
	return tmp.value;
}
int main () 
{
	float a, res;
	
	scanf("%f",&a);
	res = mult4(a);
	printf("%.3f", res);

	return 0;
}