We're dividing 91890686 by 680 
We want to figure out the number of times 91890686 can be divided by 680.

Advancing to step 1:
If we divide 9 by 680, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 680

Step 2:
680 can be fit into 91 0 times, resulting in a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Bring next digit (8) of the dividend behind the 91 and repeat the process: 918 / 680

Step 3:
680 can be fit into 918 1 times, resulting in a remainder of 238.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 680 from 918 to get 238.
Bring next digit (9) of the dividend behind the 238 and repeat the process: 2389 / 680

Step 4:
The number 680 fits into 2389 3 times, leaving a remainder of 349.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 2040 from 2389 to get 349.
Take the next digit (0) from the dividend and append it to 349, then repeat: 3490 / 680

On to step 5:
680 goes into 3490 5 times with a remainder of 90.
Put 5 as the next digit of the answer. 
Result so far: 135.0
If we subtract 3400 from 3490, we get 90.
Append the next digit (6) from the dividend to 90 and continue with: 906 / 680

Advancing to step 6:
The number 680 fits into 906 1 times, leaving a remainder of 226.
The number 1 becomes the next digit in our result. 
Result so far: 1351.0
Subtracting 680 from 906 leaves us with 226.
Include the next digit (8) from the dividend after 226, then repeat: 2268 / 680

Moving on to step 7:
680 goes into 2268 3 times with a remainder of 228.
Write down 3 as next digit of the result. 
Result so far: 13513.0
Deduct 2040 from 2268 and we're left with 228.
Take the next digit (6) from the dividend and append it to 228, then repeat: 2286 / 680

Moving on to step 8:
680 goes into 2286 3 times with a remainder of 246.
The next digit of our result is 3. 
Result so far: 135133.0
If we subtract 2040 from 2286, we get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Moving on to step 9:
680 can be fit into 2460 3 times, resulting in a remainder of 420.
Record the quotient 3 as the next digit in the result. 
Result so far: 135133.3
Subtracting 2040 from 2460 leaves us with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

On to step 10:
680 can be fit into 4200 6 times, resulting in a remainder of 120.
Use 6 as the next digit of our solution. 
Result so far: 135133.36
Subtracting 4080 from 4200 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 11:
680 goes into 1200 1 times with a remainder of 520.
The next digit of our result is 1. 
Result so far: 135133.361
Subtract 680 from 1200 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Step 12:
If we divide 5200 by 680, we get 7 and a remainder of 440.
Put 7 as the next digit of the answer. 
Result so far: 135133.3617
Deduct 4760 from 5200 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Moving on to step 13:
4400 divided by 680 is 6 with a remainder of 320.
Use 6 as the next digit of our solution. 
Result so far: 135133.36176
The remainder is 320 after subtracting 4080 from 4400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 14:
If we divide 3200 by 680, we get 4 and a remainder of 480.
The number 4 becomes the next digit in our result. 
Result so far: 135133.361764
Deduct 2720 from 3200 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 15:
When dividing 4800 by 680, we get 7 with a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 135133.3617647
Subtract 4760 from 4800 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 16:
If we divide 400 by 680, we get 0 and a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 135133.3617647
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 135133.3617647, with a leftover of 4e-07.