20961 ÷ 8 = 2620 R1
Let's divide 20961 by 8.

Step 1:
8 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 (0) of the dividend behind the 2 and repeat the process: 20 / 8

Step 2:
8 goes into 20 2 times with a remainder of 4.
Write down 2 as next digit of of the result. 
Result so far: 2
Subtract 16 from 20 to get 4.
Bring next digit (9) of the dividend behind the 4 and repeat the process: 49 / 8

Step 3:
8 goes into 49 6 times with a remainder of 1.
Write down 6 as next digit of of the result. 
Result so far: 26
Subtract 48 from 49 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 8

Step 4:
8 goes into 16 2 times with a remainder of 0.
Write down 2 as next digit of of the result. 
Result so far: 262
Subtract 16 from 16 to get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 8

Step 5:
8 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of of the result. 
Result so far: 2620
Subtract 0 from 1 to get 1.

The final result is 2620 with a remainder of 1.