We look at the division of 91491172 by 138 
We're looking to find how many times 138 goes into 91491172.

On to step 1:
If we divide 9 by 138, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 138

On to step 2:
When dividing 91 by 138, we get 0 with a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 91 and we're left with 91.
Include the next digit (4) from the dividend after 91, then repeat: 914 / 138

Going ahead to step 3:
138 can be fit into 914 6 times, resulting in a remainder of 86.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 828 from 914 and we're left with 86.
Include the next digit (9) from the dividend after 86, then repeat: 869 / 138

Advancing to step 4:
If we divide 869 by 138, we get 6 and a remainder of 41.
Write down 6 as next digit of the result. 
Result so far: 66.0
If we subtract 828 from 869, we get 41.
Grab the next digit (1) from the dividend, add it to 41, then carry on: 411 / 138

Let's proceed to step 5:
138 can be fit into 411 2 times, resulting in a remainder of 135.
The number 2 becomes the next digit in our result. 
Result so far: 662.0
Deduct 276 from 411 and we're left with 135.
Fetch the next digit (1) from the dividend, attach it to 135 and continue: 1351 / 138

Going ahead to step 6:
The number 138 fits into 1351 9 times, leaving a remainder of 109.
The next digit of our result is 9. 
Result so far: 6629.0
If we take 1242 away from 1351, we end up with 109.
Append the next digit (7) from the dividend to 109 and continue with: 1097 / 138

Step 7:
1097 divided by 138 is 7 with a remainder of 131.
The next digit of our result is 7. 
Result so far: 66297.0
If we take 966 away from 1097, we end up with 131.
Include the next digit (2) from the dividend after 131, then repeat: 1312 / 138

Let's proceed to step 8:
When dividing 1312 by 138, we get 9 with a remainder of 70.
Put 9 as the next digit of the answer. 
Result so far: 662979.0
Deduct 1242 from 1312 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 9:
700 divided by 138 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 662979.5
Subtract 690 from 700 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
138 goes into 100 0 times with a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 662979.5
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 11:
138 can be fit into 1000 7 times, resulting in a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 662979.507
The remainder is 34 after subtracting 966 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 12:
340 divided by 138 is 2 with a remainder of 64.
Write down 2 as next digit of the result. 
Result so far: 662979.5072
Deduct 276 from 340 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
When dividing 640 by 138, we get 4 with a remainder of 88.
Record the quotient 4 as the next digit in the result. 
Result so far: 662979.50724
Subtracting 552 from 640 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 14:
138 goes into 880 6 times with a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 662979.507246
Subtract 828 from 880 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Let's proceed to step 15:
The number 138 fits into 520 3 times, leaving a remainder of 106.
Write down 3 as next digit of the result. 
Result so far: 662979.5072463
If we take 414 away from 520, we end up with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Moving on to step 16:
138 goes into 1060 7 times with a remainder of 94.
Record the quotient 7 as the next digit in the result. 
Result so far: 662979.50724637
If we subtract 966 from 1060, we get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

The final result is 662979.50724637 with a remainder of 9.4e-08.