81634170 divided by 661 
We're looking to find how many times 661 goes into 81634170.

Moving on to step 1:
The number 661 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 661

Step 2:
When dividing 81 by 661, we get 0 with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Grab the next digit (6) from the dividend, add it to 81, then carry on: 816 / 661

Let's proceed to step 3:
If we divide 816 by 661, we get 1 and a remainder of 155.
The next digit of our result is 1. 
Result so far: 1.0
If we take 661 away from 816, we end up with 155.
Append the next digit (3) from the dividend to 155 and continue with: 1553 / 661

On to step 4:
If we divide 1553 by 661, we get 2 and a remainder of 231.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 1322 from 1553, we get 231.
Fetch the next digit (4) from the dividend, attach it to 231 and continue: 2314 / 661

Advancing to step 5:
When dividing 2314 by 661, we get 3 with a remainder of 331.
Use 3 as the next digit of our solution. 
Result so far: 123.0
If we take 1983 away from 2314, we end up with 331.
Include the next digit (1) from the dividend after 331, then repeat: 3311 / 661

On to step 6:
661 goes into 3311 5 times with a remainder of 6.
Write down 5 as next digit of the result. 
Result so far: 1235.0
If we take 3305 away from 3311, we end up with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 661

Advancing to step 7:
661 can be fit into 67 0 times, resulting in a remainder of 67.
Write down 0 as next digit of the result. 
Result so far: 12350.0
Subtract 0 from 67 to get 67.
Include the next digit (0) from the dividend after 67, then repeat: 670 / 661

On to step 8:
When dividing 670 by 661, we get 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 123501.0
If we subtract 661 from 670, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 9:
The number 661 fits into 90 0 times, leaving a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 123501.0
Subtract 0 from 90 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 10:
If we divide 900 by 661, we get 1 and a remainder of 239.
The next digit of our result is 1. 
Result so far: 123501.01
If we subtract 661 from 900, we get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Step 11:
661 goes into 2390 3 times with a remainder of 407.
Record the quotient 3 as the next digit in the result. 
Result so far: 123501.013
If we take 1983 away from 2390, we end up with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Let's proceed to step 12:
The number 661 fits into 4070 6 times, leaving a remainder of 104.
Use 6 as the next digit of our solution. 
Result so far: 123501.0136
Deduct 3966 from 4070 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Going ahead to step 13:
1040 divided by 661 is 1 with a remainder of 379.
Put 1 as the next digit of the answer. 
Result so far: 123501.01361
The remainder is 379 after subtracting 661 from 1040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

Going ahead to step 14:
3790 divided by 661 is 5 with a remainder of 485.
Write down 5 as next digit of the result. 
Result so far: 123501.013615
The remainder is 485 after subtracting 3305 from 3790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Moving on to step 15:
The number 661 fits into 4850 7 times, leaving a remainder of 223.
Record the quotient 7 as the next digit in the result. 
Result so far: 123501.0136157
Subtract 4627 from 4850 to get 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

Step 16:
661 can be fit into 2230 3 times, resulting in a remainder of 247.
Record the quotient 3 as the next digit in the result. 
Result so far: 123501.01361573
The remainder is 247 after subtracting 1983 from 2230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

The quotient of the division is 123501.01361573, and the remainder is 2.47e-07.