/*
	CH-230-A
	a3_p3.c
	Christopher Mclaughlan
	[email protected]
*/

#include <stdio.h>

int main()
{
	int cm;

	scanf("%d", &cm);

	float new = convert(cm);

	printf("%f", new);

	return 0;
}

float convert(int cm) {
	float km = cm / 1000.0;
	printf("km=%f\n", km);
	return km;
}