121866 ÷ 28 
Our goal is to divide 121866 by 28.

Going ahead to step 1:
If we divide 1 by 28, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 28

Advancing to step 2:
When dividing 12 by 28, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 28

Moving on to step 3:
The number 28 fits into 121 4 times, leaving a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 9 after subtracting 112 from 121.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 28

Step 4:
98 divided by 28 is 3 with a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 43.0
If we take 84 away from 98, we end up with 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 28

On to step 5:
If we divide 146 by 28, we get 5 and a remainder of 6.
Record the quotient 5 as the next digit in the result. 
Result so far: 435.0
Subtracting 140 from 146 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 28

Let's proceed to step 6:
If we divide 66 by 28, we get 2 and a remainder of 10.
The next digit of our result is 2. 
Result so far: 4352.0
The remainder is 10 after subtracting 56 from 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
28 can be fit into 100 3 times, resulting in a remainder of 16.
Write down 3 as next digit of the result. 
Result so far: 4352.3
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
The number 28 fits into 160 5 times, leaving a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 4352.35
Subtracting 140 from 160 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
When dividing 200 by 28, we get 7 with a remainder of 4.
The next digit of our result is 7. 
Result so far: 4352.357
Deduct 196 from 200 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
If we divide 40 by 28, we get 1 and a remainder of 12.
The next digit of our result is 1. 
Result so far: 4352.3571
Subtracting 28 from 40 leaves us 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 11:
120 divided by 28 is 4 with a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 4352.35714
If we take 112 away from 120, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 12:
80 divided by 28 is 2 with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 4352.357142
Subtract 56 from 80 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 13:
28 goes into 240 8 times with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 4352.3571428
The remainder is 16 after subtracting 224 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 14:
28 goes into 160 5 times with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 4352.35714285
If we subtract 140 from 160, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 4352.35714285, and the remainder is 2e-08.