We look at the division of 139661 by 91 
We're looking to find how many times 91 goes into 139661.

Step 1:
1 divided by 91 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 91

Going ahead to step 2:
If we divide 13 by 91, we get 0 and a remainder of 13.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 91

Step 3:
139 divided by 91 is 1 with a remainder of 48.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 91 from 139 to get 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 91

Let's proceed to step 4:
91 can be fit into 486 5 times, resulting in a remainder of 31.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 455 from 486, we get 31.
Append the next digit (6) from the dividend to 31 and continue with: 316 / 91

Step 5:
The number 91 fits into 316 3 times, leaving a remainder of 43.
Use 3 as the next digit of our solution. 
Result so far: 153.0
The remainder is 43 after subtracting 273 from 316.
Fetch the next digit (1) from the dividend, attach it to 43 and continue: 431 / 91

Let's proceed to step 6:
If we divide 431 by 91, we get 4 and a remainder of 67.
Record the quotient 4 as the next digit in the result. 
Result so far: 1534.0
If we take 364 away from 431, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 7:
670 divided by 91 is 7 with a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 1534.7
If we subtract 637 from 670, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 8:
91 can be fit into 330 3 times, resulting in a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 1534.73
Deduct 273 from 330 and we're left with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 9:
91 can be fit into 570 6 times, resulting in a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 1534.736
If we subtract 546 from 570, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 10:
91 can be fit into 240 2 times, resulting in a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 1534.7362
If we take 182 away from 240, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 11:
580 divided by 91 is 6 with a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 1534.73626
If we take 546 away from 580, we end up with 34.
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:
When dividing 340 by 91, we get 3 with a remainder of 67.
The number 3 becomes the next digit in our result. 
Result so far: 1534.736263
If we take 273 away from 340, we end up with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Advancing to step 13:
When dividing 670 by 91, we get 7 with a remainder of 33.
The next digit of our result is 7. 
Result so far: 1534.7362637
Subtract 637 from 670 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 14:
The number 91 fits into 330 3 times, leaving a remainder of 57.
The next digit of our result is 3. 
Result so far: 1534.73626373
The remainder is 57 after subtracting 273 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The quotient of the division is 1534.73626373, and the remainder is 5.7e-08.