664040 ÷ 91 
Let's see how many times 91 fits into 664040.

Advancing to step 1:
6 divided by 91 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 91

On to step 2:
91 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Bring next digit (4) of the dividend behind the 66 and repeat the process: 664 / 91

Going ahead to step 3:
When dividing 664 by 91, we get 7 with a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 637 from 664 leaves us with 27.
Include the next digit (0) from the dividend after 27, then repeat: 270 / 91

Going ahead to step 4:
If we divide 270 by 91, we get 2 and a remainder of 88.
The number 2 becomes the next digit in our result. 
Result so far: 72.0
The remainder is 88 after subtracting 182 from 270.
Include the next digit (4) from the dividend after 88, then repeat: 884 / 91

Let's proceed to step 5:
The number 91 fits into 884 9 times, leaving a remainder of 65.
The next digit of our result is 9. 
Result so far: 729.0
Deduct 819 from 884 and we're left with 65.
Include the next digit (0) from the dividend after 65, then repeat: 650 / 91

Moving on to step 6:
91 goes into 650 7 times with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 7297.0
Subtract 637 from 650 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
The number 91 fits into 130 1 times, leaving a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 7297.1
If we subtract 91 from 130, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Step 8:
390 divided by 91 is 4 with a remainder of 26.
The number 4 becomes the next digit in our result. 
Result so far: 7297.14
Deduct 364 from 390 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
91 goes into 260 2 times with a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 7297.142
If we take 182 away from 260, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 10:
780 divided by 91 is 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 7297.1428
Subtracting 728 from 780 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 11:
91 goes into 520 5 times with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 7297.14285
Deduct 455 from 520 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 12:
650 divided by 91 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 7297.142857
The remainder is 13 after subtracting 637 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 13:
130 divided by 91 is 1 with a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 7297.1428571
If we subtract 91 from 130, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 14:
91 goes into 390 4 times with a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 7297.14285714
The remainder is 26 after subtracting 364 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final result is 7297.14285714 with a remainder of 2.6e-08.