#include<iostream>
#include<fstream>
#include<ctime>
using namespace std;
int main(){
	 clock_t ti;

	int t,n,m,lungime,nr;
	ifstream f("progresie.in");
	ofstream g("progresie.out");
	f>>t;
	while(t--)
	{   
		ti = clock();
		f>>n>>m;
		lungime=(n-1)*m+1;
		nr=lungime*(lungime-1)+1;
		
		g<<nr<<endl;
		ti = clock() - ti;
		printf ("It took me %d clicks (%f seconds).\n",ti,((float)ti)/CLOCKS_PER_SEC);
	}
	cin.ignore();
	return 0;
}