According to the relevant data of Baidu question bank, 1 billion times 1 billion equals 1 trillion.

This is a very large number, and it is hard to imagine its scale. Mathematically, we know that the result of multiplying one number by another is the product of these two numbers. In this problem, multiplying 1 billion by 1 billion is actually the square of the digits of 1 billion. This calculation is very difficult for human beings, because 100 million digits is too big for us to calculate the result manually. But for computers, this problem can be easily solved.