561 - Strange Logic

Strange Logic

Time Limit: 0.5 sec

**The Problem**

Shawon is a class seven students. He loves to solve math. He is confused in this math problem.

The problem is

11 x 11 = 4

11 x 22 = 8

11 x 33 = 12

What is the logic behind? - Shawon says

Can you help him to find the logic?

**The Input**

Input starts with an integer **T(1<=T<=100)**, denoting the number of test cases. Each test case contains two integers **M **and** N (9<M, N<100)**.

**The Output**

For each test case, print "**Case X: Y**" here **X** is the case number stating from 1 and **Y** is the multiplication answer.

**Sample Input**

2

11 22

11 33

**Sample Output**

Case 1: 4

Case 2: 12

Problem Setter: Shahin ShamS