81922611 ÷ 646 
We're looking to find how many times 646 goes into 81922611.

On to step 1:
If we divide 8 by 646, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 646

Step 2:
When dividing 81 by 646, we get 0 with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Take the next digit (9) from the dividend and append it to 81, then repeat: 819 / 646

On to step 3:
The number 646 fits into 819 1 times, leaving a remainder of 173.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 173 after subtracting 646 from 819.
Bring next digit (2) of the dividend behind the 173 and repeat the process: 1732 / 646

Going ahead to step 4:
1732 divided by 646 is 2 with a remainder of 440.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 1292 from 1732, we get 440.
Append the next digit (2) from the dividend to 440 and continue with: 4402 / 646

Step 5:
When dividing 4402 by 646, we get 6 with a remainder of 526.
Use 6 as the next digit of our solution. 
Result so far: 126.0
Subtracting 3876 from 4402 leaves us with 526.
Take the next digit (6) from the dividend and append it to 526, then repeat: 5266 / 646

Let's proceed to step 6:
When dividing 5266 by 646, we get 8 with a remainder of 98.
The number 8 becomes the next digit in our result. 
Result so far: 1268.0
Subtract 5168 from 5266 to get 98.
Fetch the next digit (1) from the dividend, attach it to 98 and continue: 981 / 646

Moving on to step 7:
When dividing 981 by 646, we get 1 with a remainder of 335.
Write down 1 as next digit of the result. 
Result so far: 12681.0
Subtracting 646 from 981 leaves us with 335.
Include the next digit (1) from the dividend after 335, then repeat: 3351 / 646

Moving on to step 8:
646 goes into 3351 5 times with a remainder of 121.
The next digit of our result is 5. 
Result so far: 126815.0
Deduct 3230 from 3351 and we're left with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

On to step 9:
646 goes into 1210 1 times with a remainder of 564.
Record the quotient 1 as the next digit in the result. 
Result so far: 126815.1
If we take 646 away from 1210, we end up with 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Going ahead to step 10:
5640 divided by 646 is 8 with a remainder of 472.
The number 8 becomes the next digit in our result. 
Result so far: 126815.18
The remainder is 472 after subtracting 5168 from 5640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Moving on to step 11:
If we divide 4720 by 646, we get 7 and a remainder of 198.
Record the quotient 7 as the next digit in the result. 
Result so far: 126815.187
If we subtract 4522 from 4720, we get 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Moving on to step 12:
646 can be fit into 1980 3 times, resulting in a remainder of 42.
The next digit of our result is 3. 
Result so far: 126815.1873
Subtract 1938 from 1980 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.

Advancing to step 13:
When dividing 420 by 646, we get 0 with a remainder of 420.
Use 0 as the next digit of our solution. 
Result so far: 126815.1873
Subtracting 0 from 420 leaves us with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

Let's proceed to step 14:
When dividing 4200 by 646, we get 6 with a remainder of 324.
Write down 6 as next digit of the result. 
Result so far: 126815.187306
Subtract 3876 from 4200 to get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Advancing to step 15:
3240 divided by 646 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 126815.1873065
If we take 3230 away from 3240, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 16:
100 divided by 646 is 0 with a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 126815.1873065
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 126815.1873065, with a leftover of 1e-07.