91369959 ÷ 651 
We want to figure out the number of times 91369959 can be divided by 651.

On to step 1:
The number 651 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 651

Moving on to step 2:
When dividing 91 by 651, we get 0 with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Fetch the next digit (3) from the dividend, attach it to 91 and continue: 913 / 651

Moving on to step 3:
651 can be fit into 913 1 times, resulting in a remainder of 262.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 651 away from 913, we end up with 262.
Append the next digit (6) from the dividend to 262 and continue with: 2626 / 651

Advancing to step 4:
651 can be fit into 2626 4 times, resulting in a remainder of 22.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Deduct 2604 from 2626 and we're left with 22.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 651

Step 5:
229 divided by 651 is 0 with a remainder of 229.
Use 0 as the next digit of our solution. 
Result so far: 140.0
Subtracting 0 from 229 leaves us with 229.
Grab the next digit (9) from the dividend, add it to 229, then carry on: 2299 / 651

Let's proceed to step 6:
If we divide 2299 by 651, we get 3 and a remainder of 346.
Put 3 as the next digit of the answer. 
Result so far: 1403.0
Subtracting 1953 from 2299 leaves us with 346.
Include the next digit (5) from the dividend after 346, then repeat: 3465 / 651

Let's proceed to step 7:
3465 divided by 651 is 5 with a remainder of 210.
The number 5 becomes the next digit in our result. 
Result so far: 14035.0
If we take 3255 away from 3465, we end up with 210.
Grab the next digit (9) from the dividend, add it to 210, then carry on: 2109 / 651

Moving on to step 8:
When dividing 2109 by 651, we get 3 with a remainder of 156.
Use 3 as the next digit of our solution. 
Result so far: 140353.0
Subtracting 1953 from 2109 leaves us with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

On to step 9:
1560 divided by 651 is 2 with a remainder of 258.
Put 2 as the next digit of the answer. 
Result so far: 140353.2
Subtracting 1302 from 1560 leaves us with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 10:
2580 divided by 651 is 3 with a remainder of 627.
The number 3 becomes the next digit in our result. 
Result so far: 140353.23
Subtracting 1953 from 2580 leaves us with 627.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6270, and continue the process.

On to step 11:
When dividing 6270 by 651, we get 9 with a remainder of 411.
The next digit of our result is 9. 
Result so far: 140353.239
Subtracting 5859 from 6270 leaves us with 411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4110, and continue the process.

Let's proceed to step 12:
If we divide 4110 by 651, we get 6 and a remainder of 204.
Use 6 as the next digit of our solution. 
Result so far: 140353.2396
Subtract 3906 from 4110 to get 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Step 13:
When dividing 2040 by 651, we get 3 with a remainder of 87.
Put 3 as the next digit of the answer. 
Result so far: 140353.23963
Deduct 1953 from 2040 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 14:
If we divide 870 by 651, we get 1 and a remainder of 219.
The number 1 becomes the next digit in our result. 
Result so far: 140353.239631
Subtract 651 from 870 to get 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Advancing to step 15:
2190 divided by 651 is 3 with a remainder of 237.
Put 3 as the next digit of the answer. 
Result so far: 140353.2396313
The remainder is 237 after subtracting 1953 from 2190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Moving on to step 16:
651 goes into 2370 3 times with a remainder of 417.
The number 3 becomes the next digit in our result. 
Result so far: 140353.23963133
Deduct 1953 from 2370 and we're left with 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

The final result is 140353.23963133 with a remainder of 4.17e-07.