We're dividing 12209689 by 400 
Let's see how many times 400 fits into 12209689.

Moving on to step 1:
When dividing 1 by 400, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 400

Let's proceed to step 2:
If we divide 12 by 400, we get 0 and a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 400

Advancing to step 3:
400 can be fit into 122 0 times, resulting in a remainder of 122.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 122 to get 122.
Take the next digit (0) from the dividend and append it to 122, then repeat: 1220 / 400

Step 4:
When dividing 1220 by 400, we get 3 with a remainder of 20.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 1200 from 1220 and we're left with 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 400

On to step 5:
The number 400 fits into 209 0 times, leaving a remainder of 209.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Subtract 0 from 209 to get 209.
Bring next digit (6) of the dividend behind the 209 and repeat the process: 2096 / 400

Going ahead to step 6:
The number 400 fits into 2096 5 times, leaving a remainder of 96.
Use 5 as the next digit of our solution. 
Result so far: 305.0
The remainder is 96 after subtracting 2000 from 2096.
Include the next digit (8) from the dividend after 96, then repeat: 968 / 400

Going ahead to step 7:
400 goes into 968 2 times with a remainder of 168.
Put 2 as the next digit of the answer. 
Result so far: 3052.0
If we subtract 800 from 968, we get 168.
Include the next digit (9) from the dividend after 168, then repeat: 1689 / 400

Moving on to step 8:
400 can be fit into 1689 4 times, resulting in a remainder of 89.
Put 4 as the next digit of the answer. 
Result so far: 30524.0
If we take 1600 away from 1689, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Step 9:
If we divide 890 by 400, we get 2 and a remainder of 90.
The number 2 becomes the next digit in our result. 
Result so far: 30524.2
The remainder is 90 after subtracting 800 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 10:
If we divide 900 by 400, we get 2 and a remainder of 100.
Write down 2 as next digit of the result. 
Result so far: 30524.22
Subtracting 800 from 900 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

In conclusion, the division gives 30524.22 with a balance of 0.1.