Answer: 1,404 lb
Explanation:
1. You have the following information given in the problem:
- The weight of the astronaut on eart is 126 lb.
- The weight of the astronaut on the moon is 21 lb.
2. Therefore, you can calculate the weight of a person on earth, knowing that that person weighs 234 lb of the moon, as following:

Then, the person would weighs 1,404 lb on earth.