4721 ÷ 3 = 1573 R2
Alright, let's work through the division of 4721 by 3 step by step.

Step 1:
3 goes into 4 1 times with a remainder of 1.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 3 from 4 to get 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 3

Step 2:
3 goes into 17 5 times with a remainder of 2.
Write down 5 as next digit of of the result. 
Result so far: 15
Subtract 15 from 17 to get 2.
Bring next digit (2) of the dividend behind the 2 and repeat the process: 22 / 3

Step 3:
3 goes into 22 7 times with a remainder of 1.
Write down 7 as next digit of of the result. 
Result so far: 157
Subtract 21 from 22 to get 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 3

Step 4:
3 goes into 11 3 times with a remainder of 2.
Write down 3 as next digit of of the result. 
Result so far: 1573
Subtract 9 from 11 to get 2.

The final result is 1573 with a remainder of 2.