第一个！！

#include <stdio.h>
#include <string.h>

int main() {
    int n;
    scanf("%d", &n);
    getchar(); 
    
    for (int i = 0; i < n; i++) {
        char line[100];
        fgets(line, sizeof(line), stdin);
        
        int x;
        char unit1[10], unit2[10];
        sscanf(line, "%d %s = ? %s", &x, unit1, unit2);
        
        long long factor = 1;
        if (strcmp(unit1, "km") == 0 && strcmp(unit2, "m") == 0) {
            factor = 1000;
        } else if (strcmp(unit1, "km") == 0 && strcmp(unit2, "mm") == 0) {
            factor = 1000000;
        } else if (strcmp(unit1, "m") == 0 && strcmp(unit2, "mm") == 0) {
            factor = 1000;
        } else if (strcmp(unit1, "kg") == 0 && strcmp(unit2, "g") == 0) {
            factor = 1000;
        } else if (strcmp(unit1, "kg") == 0 && strcmp(unit2, "mg") == 0) {
            factor = 1000000;
        } else if (strcmp(unit1, "g") == 0 && strcmp(unit2, "mg") == 0) {
            factor = 1000;
        }
        
        long long result = (long long)x * factor;
        printf("%d %s = %lld %s\n", x, unit1, result, unit2);
    }
    
    return 0;
}