package com.lin; import java.util.Scanner; public class 翻转牌 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int t = sc.nextInt(); for (int x = 0; x < t; ++x) { int n = sc.nextInt(); int m = sc.nextInt(); if (n == 1 && m == 1) { System.out.println(1); } else if (n == 1 || m == 1) { System.out.println(Math.max(n, m) - 2); } else { System.out.println((n - 2) * (m - 2)); } } } }