forked interv 10/XII/2021

#include <bits/stdc++.h>
using namespace std;

pair<int, string> parseLine(const string &line) {
    int nr = 0, i;
    for (i = 0; line[i] != ' '; i++) {
        nr = 10 * nr + line[i] - '0';
    }
    return make_pair(nr, line.substr(i + 1));
}

void solve(const vector<string> &lines) {
    double ans = 0;
    for (const auto &line : lines) {
        const auto &[nr, unity] = parseLine(line);
        if (unity == "kg") {
            ans += nr * 1e3;
        } else if (unity == "mg") {
            ans += 1.0 * nr / 1e3;
        } else {
            ans += nr;
        }
    }
    cout << fixed << showpoint << setprecision(5) << ans << " g" << endl;
}

vector<string> read() {
    vector<string> lines;
    for (string line; getline(cin, line);) {
        lines.push_back(line);
    }
    return lines;
}

signed main() {
    freopen("text.in", "r", stdin);
    solve(read());
    return 0;
}