81811851 ÷ 398 
Let's see how many times 398 fits into 81811851.

Step 1:
If we divide 8 by 398, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 398

Let's proceed to step 2:
398 can be fit into 81 0 times, resulting in a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Include the next digit (8) from the dividend after 81, then repeat: 818 / 398

Let's proceed to step 3:
398 goes into 818 2 times with a remainder of 22.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 22 after subtracting 796 from 818.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 398

Advancing to step 4:
The number 398 fits into 221 0 times, leaving a remainder of 221.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
The remainder is 221 after subtracting 0 from 221.
Grab the next digit (1) from the dividend, add it to 221, then carry on: 2211 / 398

Let's proceed to step 5:
398 goes into 2211 5 times with a remainder of 221.
The next digit of our result is 5. 
Result so far: 205.0
Subtracting 1990 from 2211 leaves us with 221.
Take the next digit (8) from the dividend and append it to 221, then repeat: 2218 / 398

Going ahead to step 6:
When dividing 2218 by 398, we get 5 with a remainder of 228.
The number 5 becomes the next digit in our result. 
Result so far: 2055.0
If we subtract 1990 from 2218, we get 228.
Bring next digit (5) of the dividend behind the 228 and repeat the process: 2285 / 398

Moving on to step 7:
2285 divided by 398 is 5 with a remainder of 295.
Use 5 as the next digit of our solution. 
Result so far: 20555.0
Subtract 1990 from 2285 to get 295.
Append the next digit (1) from the dividend to 295 and continue with: 2951 / 398

Advancing to step 8:
398 can be fit into 2951 7 times, resulting in a remainder of 165.
Use 7 as the next digit of our solution. 
Result so far: 205557.0
If we take 2786 away from 2951, we end up with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

On to step 9:
398 goes into 1650 4 times with a remainder of 58.
Put 4 as the next digit of the answer. 
Result so far: 205557.4
Deduct 1592 from 1650 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 10:
580 divided by 398 is 1 with a remainder of 182.
The next digit of our result is 1. 
Result so far: 205557.41
If we take 398 away from 580, we end up with 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Let's proceed to step 11:
If we divide 1820 by 398, we get 4 and a remainder of 228.
Record the quotient 4 as the next digit in the result. 
Result so far: 205557.414
The remainder is 228 after subtracting 1592 from 1820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Let's proceed to step 12:
If we divide 2280 by 398, we get 5 and a remainder of 290.
The number 5 becomes the next digit in our result. 
Result so far: 205557.4145
Subtracting 1990 from 2280 leaves us with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 13:
The number 398 fits into 2900 7 times, leaving a remainder of 114.
Use 7 as the next digit of our solution. 
Result so far: 205557.41457
If we subtract 2786 from 2900, we get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Moving on to step 14:
If we divide 1140 by 398, we get 2 and a remainder of 344.
Put 2 as the next digit of the answer. 
Result so far: 205557.414572
The remainder is 344 after subtracting 796 from 1140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Advancing to step 15:
398 can be fit into 3440 8 times, resulting in a remainder of 256.
The next digit of our result is 8. 
Result so far: 205557.4145728
Subtracting 3184 from 3440 leaves us with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Let's proceed to step 16:
The number 398 fits into 2560 6 times, leaving a remainder of 172.
The next digit of our result is 6. 
Result so far: 205557.41457286
Deduct 2388 from 2560 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

The quotient of the division is 205557.41457286, and the remainder is 1.72e-07.