1. Let's start by understanding the problem clearly. You asked me to explain a concept in easy words with proper step-by-step working. 2. Since you did not specify which problem or concept you want me to explain, please provide the exact math question or topic you want help with. 3. Once I have the problem or topic, I will break it down into numbered steps. 4. Each step will include detailed, friendly explanations and all the necessary intermediate mathematics with proper formatting. 5. I will use LaTeX formatting to clearly show all calculations and final answers. Please send me the exact math problem or concept you want to understand better!