Let's divide 81171945 by 409
We're looking to find how many times 409 goes into 81171945.

Going ahead to step 1:
409 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 409

On to step 2:
The number 409 fits into 81 0 times, leaving a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Bring next digit (1) of the dividend behind the 81 and repeat the process: 811 / 409

Going ahead to step 3:
811 divided by 409 is 1 with a remainder of 402.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 402 after subtracting 409 from 811.
Fetch the next digit (7) from the dividend, attach it to 402 and continue: 4027 / 409

On to step 4:
If we divide 4027 by 409, we get 9 and a remainder of 346.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 3681 away from 4027, we end up with 346.
Append the next digit (1) from the dividend to 346 and continue with: 3461 / 409

Step 5:
When dividing 3461 by 409, we get 8 with a remainder of 189.
The number 8 becomes the next digit in our result. 
Result so far: 198.0
Deduct 3272 from 3461 and we're left with 189.
Include the next digit (9) from the dividend after 189, then repeat: 1899 / 409

Going ahead to step 6:
The number 409 fits into 1899 4 times, leaving a remainder of 263.
Use 4 as the next digit of our solution. 
Result so far: 1984.0
Deduct 1636 from 1899 and we're left with 263.
Bring next digit (4) of the dividend behind the 263 and repeat the process: 2634 / 409

Going ahead to step 7:
2634 divided by 409 is 6 with a remainder of 180.
Record the quotient 6 as the next digit in the result. 
Result so far: 19846.0
Subtract 2454 from 2634 to get 180.
Fetch the next digit (5) from the dividend, attach it to 180 and continue: 1805 / 409

Going ahead to step 8:
The number 409 fits into 1805 4 times, leaving a remainder of 169.
Record the quotient 4 as the next digit in the result. 
Result so far: 198464.0
Subtracting 1636 from 1805 leaves us with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Step 9:
When dividing 1690 by 409, we get 4 with a remainder of 54.
The number 4 becomes the next digit in our result. 
Result so far: 198464.4
If we subtract 1636 from 1690, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 10:
409 goes into 540 1 times with a remainder of 131.
Write down 1 as next digit of the result. 
Result so far: 198464.41
Subtracting 409 from 540 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Step 11:
If we divide 1310 by 409, we get 3 and a remainder of 83.
Write down 3 as next digit of the result. 
Result so far: 198464.413
The remainder is 83 after subtracting 1227 from 1310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Advancing to step 12:
409 can be fit into 830 2 times, resulting in a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 198464.4132
Subtracting 818 from 830 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.

Advancing to step 13:
120 divided by 409 is 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 198464.4132
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 14:
The number 409 fits into 1200 2 times, leaving a remainder of 382.
Use 2 as the next digit of our solution. 
Result so far: 198464.413202
Subtract 818 from 1200 to get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Let's proceed to step 15:
409 can be fit into 3820 9 times, resulting in a remainder of 139.
Put 9 as the next digit of the answer. 
Result so far: 198464.4132029
If we subtract 3681 from 3820, we get 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

On to step 16:
When dividing 1390 by 409, we get 3 with a remainder of 163.
Use 3 as the next digit of our solution. 
Result so far: 198464.41320293
Subtract 1227 from 1390 to get 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

The quotient of the division is 198464.41320293, and the remainder is 1.63e-07.