The number 3 in the number 513 has a value of 3 units.
So we need a number where the number 3 has a value 10 times greater, that is, a value of 30 units (or 3 tens).
The value of the number 3 in each option is:
- 5,130 -> 3 tens
- 51.3 -> 3 tenths
- 5.13 -> 3 hundredths
- 51,300 -> 3 hundreds
So the correct option is the first one.