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for _ in range(int(input().strip())):
    total = 0
    for __ in range(int(input().strip())):
        a,b,c = map(int,input().split())
        total += (a*c)
    print(total)

abidkhan484

# solved

import sys

def getTheSum(num):
    if len(num)==1:
        return num
    summation = 0
    for each in map(int, num):
        summation += each

abidkhan484

#! /usr/bin/python3


from requests import get
from bs4 import BeautifulSoup as bs
from smtplib import SMTP

"""
Allow less secure app: ON
from below link

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var hour_vals = new Array();
var time_diff = 10;
var total_slot = (60*24)/time_diff;
var minute_for_pad = 0;
var hour_for_pad = 0;
var i, t_hour, t_min, hour_init;
for(i=0; i<total_slot; i++){
    t_hour = '' + hour_for_pad;
    t_min = '' + minute_for_pad;
    hour_init = t_hour.padStart(2, "0") + ":" +t_min.padStart(2, "0");

abidkhan484

#!/usr/bin/env python

# to import MySQLdb,
# sudo apt-get install python-pip python-dev libmysqlclient-dev
# pip install MySQL-python


import MySQLdb
import datetime
import os

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#!/usr/bin/python3

# accepted

import sys


ll = 1000001
arr = [0] * ll
arr[0], arr[1] = 0, 1

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<?php

function getDistanceFromLatLonInKm() {
    // $lat1,$lon1,$lat2,$lon2
    $lat1 = 23.747047;
    $lon1 = 90.386709;

    $lat2 = 23.783014;
    $lon2 = 90.395310;

abidkhan484

from bs4 import BeautifulSoup
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as ec
from selenium.webdriver.common.by import By
from selenium.common.exceptions import TimeoutException


import csv
import time

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import socket
import random
import time
import sys

log_level = 2

def log(text, level=1):
    if log_level >= level:
        print(text)

abidkhan484

# not yet solved
# a test case: 15 5 2 3

n, a, b, c = map(int, input().split())
a, b, c = sorted([a,b,c])
p, q, r = (n//a)+1, (n//b)+1, (n//c)+1


maximum = -1
for i in range(r):