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Given two binary strings **A **and **B** that represent value of two integers, find the product of two strings in Decimal Value.

**Example 1:**

**Input:**
**A = **"1100" , **B = **"01"
**Output:**
12
**Explanation:**
Decimal representation of A is 12 and
that of B is 1. So, A*B gives the
output 12.

**Example 2:**

**Input:**
**A = **"01" , **B = **"01"
**Output:**
1
**Explanation:**
Decimal representation of both A and
B is 1. So, A*B gives the output 1.

**Your Task:**

You don't need to read input or print anything. Your task is to complete the function **karatsubaAlgo()** which takes Strings A and B as input and returns the answer.

**Expected Time Complexity:** O(Length of Binary String)

**Expected Auxiliary Space:** O(1)

**Constraints:**

1 <= |A|,|B| <= 25

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Karatsuba Algorithm

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