Let's divide 61851 by 21
We're looking to find how many times 21 goes into 61851.

Moving on to step 1:
When dividing 6 by 21, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 21

Step 2:
61 divided by 21 is 2 with a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 42 from 61 leaves us with 19.
Take the next digit (8) from the dividend and append it to 19, then repeat: 198 / 21

Moving on to step 3:
If we divide 198 by 21, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
If we subtract 189 from 198, we get 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 21

Let's proceed to step 4:
When dividing 95 by 21, we get 4 with a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 294.0
Subtracting 84 from 95 leaves us with 11.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 21

Moving on to step 5:
111 divided by 21 is 5 with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 2945.0
If we take 105 away from 111, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 6:
60 divided by 21 is 2 with a remainder of 18.
Use 2 as the next digit of our solution. 
Result so far: 2945.2
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
180 divided by 21 is 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 2945.28
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
If we divide 120 by 21, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 2945.285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 9:
When dividing 150 by 21, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 2945.2857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 10:
When dividing 30 by 21, we get 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 2945.28571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 11:
If we divide 90 by 21, we get 4 and a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 2945.285714
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 12:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 2945.2857142
If we take 42 away from 60, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
21 goes into 180 8 times with a remainder of 12.
The next digit of our result is 8. 
Result so far: 2945.28571428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 2945.28571428, and the remainder is 1.2e-08.