83191991 ÷ 428 
We want to figure out the number of times 83191991 can be divided by 428.

Let's proceed to step 1:
428 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (3) from the dividend and append it to 8, then repeat: 83 / 428

Advancing to step 2:
83 divided by 428 is 0 with a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 83, we get 83.
Grab the next digit (1) from the dividend, add it to 83, then carry on: 831 / 428

Step 3:
If we divide 831 by 428, we get 1 and a remainder of 403.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 428 from 831, we get 403.
Grab the next digit (9) from the dividend, add it to 403, then carry on: 4039 / 428

Going ahead to step 4:
When dividing 4039 by 428, we get 9 with a remainder of 187.
Put 9 as the next digit of the answer. 
Result so far: 19.0
Deduct 3852 from 4039 and we're left with 187.
Include the next digit (1) from the dividend after 187, then repeat: 1871 / 428

On to step 5:
428 can be fit into 1871 4 times, resulting in a remainder of 159.
The next digit of our result is 4. 
Result so far: 194.0
Deduct 1712 from 1871 and we're left with 159.
Fetch the next digit (9) from the dividend, attach it to 159 and continue: 1599 / 428

Going ahead to step 6:
1599 divided by 428 is 3 with a remainder of 315.
Put 3 as the next digit of the answer. 
Result so far: 1943.0
The remainder is 315 after subtracting 1284 from 1599.
Take the next digit (9) from the dividend and append it to 315, then repeat: 3159 / 428

Step 7:
3159 divided by 428 is 7 with a remainder of 163.
The next digit of our result is 7. 
Result so far: 19437.0
Subtracting 2996 from 3159 leaves us with 163.
Take the next digit (1) from the dividend and append it to 163, then repeat: 1631 / 428

On to step 8:
When dividing 1631 by 428, we get 3 with a remainder of 347.
Use 3 as the next digit of our solution. 
Result so far: 194373.0
Deduct 1284 from 1631 and we're left with 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

On to step 9:
428 goes into 3470 8 times with a remainder of 46.
Put 8 as the next digit of the answer. 
Result so far: 194373.8
Subtracting 3424 from 3470 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 10:
428 goes into 460 1 times with a remainder of 32.
Put 1 as the next digit of the answer. 
Result so far: 194373.81
If we take 428 away from 460, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 11:
The number 428 fits into 320 0 times, leaving a remainder of 320.
Use 0 as the next digit of our solution. 
Result so far: 194373.81
The remainder is 320 after subtracting 0 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 12:
The number 428 fits into 3200 7 times, leaving a remainder of 204.
The number 7 becomes the next digit in our result. 
Result so far: 194373.8107
Subtracting 2996 from 3200 leaves us with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Advancing to step 13:
If we divide 2040 by 428, we get 4 and a remainder of 328.
Write down 4 as next digit of the result. 
Result so far: 194373.81074
If we subtract 1712 from 2040, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 14:
If we divide 3280 by 428, we get 7 and a remainder of 284.
The number 7 becomes the next digit in our result. 
Result so far: 194373.810747
If we subtract 2996 from 3280, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

On to step 15:
If we divide 2840 by 428, we get 6 and a remainder of 272.
Put 6 as the next digit of the answer. 
Result so far: 194373.8107476
If we subtract 2568 from 2840, we get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 16:
2720 divided by 428 is 6 with a remainder of 152.
Use 6 as the next digit of our solution. 
Result so far: 194373.81074766
Subtract 2568 from 2720 to get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

In conclusion, the division gives 194373.81074766 with a balance of 1.52e-07.