12638284 ÷ 331 
We want to divide 12638284 by 331.

On to step 1:
331 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 331

Advancing to step 2:
331 can be fit into 12 0 times, resulting in a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Take the next digit (6) from the dividend and append it to 12, then repeat: 126 / 331

Advancing to step 3:
If we divide 126 by 331, we get 0 and a remainder of 126.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 126 to get 126.
Append the next digit (3) from the dividend to 126 and continue with: 1263 / 331

On to step 4:
When dividing 1263 by 331, we get 3 with a remainder of 270.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 993 from 1263 leaves us with 270.
Take the next digit (8) from the dividend and append it to 270, then repeat: 2708 / 331

Going ahead to step 5:
If we divide 2708 by 331, we get 8 and a remainder of 60.
Use 8 as the next digit of our solution. 
Result so far: 38.0
The remainder is 60 after subtracting 2648 from 2708.
Take the next digit (2) from the dividend and append it to 60, then repeat: 602 / 331

On to step 6:
602 divided by 331 is 1 with a remainder of 271.
The number 1 becomes the next digit in our result. 
Result so far: 381.0
The remainder is 271 after subtracting 331 from 602.
Append the next digit (8) from the dividend to 271 and continue with: 2718 / 331

Step 7:
331 can be fit into 2718 8 times, resulting in a remainder of 70.
Put 8 as the next digit of the answer. 
Result so far: 3818.0
Subtracting 2648 from 2718 leaves us with 70.
Take the next digit (4) from the dividend and append it to 70, then repeat: 704 / 331

Advancing to step 8:
The number 331 fits into 704 2 times, leaving a remainder of 42.
The next digit of our result is 2. 
Result so far: 38182.0
Subtract 662 from 704 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 9:
331 can be fit into 420 1 times, resulting in a remainder of 89.
The next digit of our result is 1. 
Result so far: 38182.1
Subtracting 331 from 420 leaves us 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.

Advancing to step 10:
331 can be fit into 890 2 times, resulting in a remainder of 228.
The number 2 becomes the next digit in our result. 
Result so far: 38182.12
Deduct 662 from 890 and we're left with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Step 11:
331 can be fit into 2280 6 times, resulting in a remainder of 294.
The number 6 becomes the next digit in our result. 
Result so far: 38182.126
The remainder is 294 after subtracting 1986 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Let's proceed to step 12:
2940 divided by 331 is 8 with a remainder of 292.
The number 8 becomes the next digit in our result. 
Result so far: 38182.1268
If we subtract 2648 from 2940, we get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Advancing to step 13:
If we divide 2920 by 331, we get 8 and a remainder of 272.
Write down 8 as next digit of the result. 
Result so far: 38182.12688
Deduct 2648 from 2920 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

The quotient of the division is 38182.12688, and the remainder is 0.000272.