We're dividing 121285 by 43 
Our goal is to divide 121285 by 43.

On to step 1:
The number 43 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 43

Moving on to step 2:
When dividing 12 by 43, we get 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 43

Going ahead to step 3:
43 can be fit into 121 2 times, resulting in a remainder of 35.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 35 after subtracting 86 from 121.
Include the next digit (2) from the dividend after 35, then repeat: 352 / 43

Step 4:
If we divide 352 by 43, we get 8 and a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 28.0
If we subtract 344 from 352, we get 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 43

Let's proceed to step 5:
88 divided by 43 is 2 with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 282.0
Subtracting 86 from 88 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 43

Let's proceed to step 6:
When dividing 25 by 43, we get 0 with a remainder of 25.
The next digit of our result is 0. 
Result so far: 2820.0
If we subtract 0 from 25, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 7:
The number 43 fits into 250 5 times, leaving a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 2820.5
The remainder is 35 after subtracting 215 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 8:
350 divided by 43 is 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 2820.58
Subtract 344 from 350 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 9:
When dividing 60 by 43, we get 1 with a remainder of 17.
Put 1 as the next digit of the answer. 
Result so far: 2820.581
If we subtract 43 from 60, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 10:
When dividing 170 by 43, we get 3 with a remainder of 41.
Put 3 as the next digit of the answer. 
Result so far: 2820.5813
Subtracting 129 from 170 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 11:
If we divide 410 by 43, we get 9 and a remainder of 23.
Put 9 as the next digit of the answer. 
Result so far: 2820.58139
If we take 387 away from 410, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 12:
43 can be fit into 230 5 times, resulting in a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 2820.581395
Subtracting 215 from 230 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 13:
When dividing 150 by 43, we get 3 with a remainder of 21.
Use 3 as the next digit of our solution. 
Result so far: 2820.5813953
Subtract 129 from 150 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 14:
The number 43 fits into 210 4 times, leaving a remainder of 38.
Put 4 as the next digit of the answer. 
Result so far: 2820.58139534
Deduct 172 from 210 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

The final result is 2820.58139534 with a remainder of 3.8e-08.