Answer:
or
![2,000,000,000,000,000,000](https://img.qammunity.org/2020/formulas/mathematics/middle-school/7m3ltlkk4xqlu0ia1lvjilbzjaloffp5xx.png)
Explanation:
You can just make the multiplication indicated:
![500,000*4,000,000,000,000=2,000,000,000,000,000,000](https://img.qammunity.org/2020/formulas/mathematics/middle-school/8jbz9iiwfxaqkl45zxh4rxkr4jfvp6bzg9.png)
You can rewrite the product in scientific notation form. This form is:
![a*10^n](https://img.qammunity.org/2020/formulas/mathematics/middle-school/hclg7l9x2guwnb2ftold3791vwwxhg73ui.png)
Where "a" is a number between 1 and 10 but lesss than 10, and "n" is an integer.
In scientific notation, the decimal point must be after the first digit.
So, for the product
the decimal point must be moved 18 places to the left.
Then, you get: