In this question the number that is in the 4th decimal place is...
56.0649702307
Nine is the 4th decimal, so this is the number that you will determine if it gets rounded or not.
This question wants you to have four decimal places left after you finish rounding
To determine if you round up or stay the same you must look at the number after the asked decimal place. In this case the number after the 4th decimal is 7. A number will round up if this number (7) is 5 or greater. If it is smaller then 5 then the decimal will not round up.
In this case 7 is bigger then 5. This means that the 4th decimal place (9) will round up
56.0650
^^^Since the fourth decimal is 9 when you round up the next number is ten. This means that the rounding will be bumped to the number in front of the 9 and the 9 will simply become zero.
Let me know if this makes sense!
~Just a girl in love with Shawn Mendes