// editor1
#include<stdio.h>
#include<string.h>
#define KMH_TO_MPH_FACTOR 0.621371
#define MPH_TO_KMH_FACTOR 1.60934
int main()
{
    char conversion_type;
    double speed_value;
    double converted_speed = 0.0;
    int is_valid = 1;
    if(scanf("%s %lf",conversion_type, &speed_value) != 2)
    {
        fprintf(stderr, "Error reading input\n");
        return 1;
    }
    if(speed_value<0.0)
    {
        printf("Invalid input\n");
        return 0;
    }
    if(strcmp(conversion_type,"KMH_TO_MPH") == 0)
    {
        converted_speed = speed_value * KMH_TO_MPH_FACTOR;
    }
    else if(strcmp(conversion_type,"MPH_TO_KMH") == 0)
    {
        converted_speed = speed_value * MPH_TO_KMH_FACTOR;
    }
    else
    {
        is_valid =0;
        printf("Invalid input\n");
    }
    if(is_valid)
    {
        printf("%.2f\n", converted_speed);
    }
    return 0;
}