21513 ÷ 5 = 4302 R3
No problem, we've got 21513 and 5 for the division.

Step 1:
5 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 5

Step 2:
5 goes into 21 4 times with a remainder of 1.
Write down 4 as next digit of of the result. 
Result so far: 4
Subtract 20 from 21 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 5

Step 3:
5 goes into 15 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 43
Subtract 15 from 15 to get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 5

Step 4:
5 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of of the result. 
Result so far: 430
Subtract 0 from 1 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 5

Step 5:
5 goes into 13 2 times with a remainder of 3.
Write down 2 as next digit of of the result. 
Result so far: 4302
Subtract 10 from 13 to get 3.

The final result is 4302 with a remainder of 3.