91274186 divided by 646 
We want to figure out the number of times 91274186 can be divided by 646.

On to step 1:
When dividing 9 by 646, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 646

Moving on to step 2:
The number 646 fits into 91 0 times, leaving a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Append the next digit (2) from the dividend to 91 and continue with: 912 / 646

Advancing to step 3:
If we divide 912 by 646, we get 1 and a remainder of 266.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 266 after subtracting 646 from 912.
Bring next digit (7) of the dividend behind the 266 and repeat the process: 2667 / 646

Let's proceed to step 4:
2667 divided by 646 is 4 with a remainder of 83.
Write down 4 as next digit of the result. 
Result so far: 14.0
The remainder is 83 after subtracting 2584 from 2667.
Grab the next digit (4) from the dividend, add it to 83, then carry on: 834 / 646

Let's proceed to step 5:
646 can be fit into 834 1 times, resulting in a remainder of 188.
Put 1 as the next digit of the answer. 
Result so far: 141.0
The remainder is 188 after subtracting 646 from 834.
Grab the next digit (1) from the dividend, add it to 188, then carry on: 1881 / 646

Going ahead to step 6:
If we divide 1881 by 646, we get 2 and a remainder of 589.
Write down 2 as next digit of the result. 
Result so far: 1412.0
Subtract 1292 from 1881 to get 589.
Take the next digit (8) from the dividend and append it to 589, then repeat: 5898 / 646

Let's proceed to step 7:
The number 646 fits into 5898 9 times, leaving a remainder of 84.
Put 9 as the next digit of the answer. 
Result so far: 14129.0
The remainder is 84 after subtracting 5814 from 5898.
Include the next digit (6) from the dividend after 84, then repeat: 846 / 646

On to step 8:
If we divide 846 by 646, we get 1 and a remainder of 200.
Write down 1 as next digit of the result. 
Result so far: 141291.0
If we take 646 away from 846, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

On to step 9:
The number 646 fits into 2000 3 times, leaving a remainder of 62.
Use 3 as the next digit of our solution. 
Result so far: 141291.3
Subtracting 1938 from 2000 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 10:
646 goes into 620 0 times with a remainder of 620.
Record the quotient 0 as the next digit in the result. 
Result so far: 141291.3
The remainder is 620 after subtracting 0 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Advancing to step 11:
646 goes into 6200 9 times with a remainder of 386.
Put 9 as the next digit of the answer. 
Result so far: 141291.309
If we take 5814 away from 6200, we end up with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Step 12:
646 can be fit into 3860 5 times, resulting in a remainder of 630.
The next digit of our result is 5. 
Result so far: 141291.3095
The remainder is 630 after subtracting 3230 from 3860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Advancing to step 13:
646 can be fit into 6300 9 times, resulting in a remainder of 486.
The next digit of our result is 9. 
Result so far: 141291.30959
The remainder is 486 after subtracting 5814 from 6300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Moving on to step 14:
When dividing 4860 by 646, we get 7 with a remainder of 338.
The next digit of our result is 7. 
Result so far: 141291.309597
Deduct 4522 from 4860 and we're left with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Step 15:
If we divide 3380 by 646, we get 5 and a remainder of 150.
The number 5 becomes the next digit in our result. 
Result so far: 141291.3095975
The remainder is 150 after subtracting 3230 from 3380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Going ahead to step 16:
When dividing 1500 by 646, we get 2 with a remainder of 208.
The number 2 becomes the next digit in our result. 
Result so far: 141291.30959752
If we subtract 1292 from 1500, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Our division results in 141291.30959752 with a remaining 2.08e-07.