Answer:
79,210
Explanation:
When we see the exponent 4 by our 10, we can move the decimal point over 4 places in 7.921 to find the answer.
First, we can move over 1.
79.21
Then another space.
792.1
Another space.
7921
And our last space.
79,210
And this is the answer.
If you have any further questions, let me know!