83990122 ÷ 425 
Let's see how many times 425 fits into 83990122.

Step 1:
425 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 425

Moving on to step 2:
83 divided by 425 is 0 with a remainder of 83.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 83 and we're left with 83.
Grab the next digit (9) from the dividend, add it to 83, then carry on: 839 / 425

Step 3:
839 divided by 425 is 1 with a remainder of 414.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 425 away from 839, we end up with 414.
Grab the next digit (9) from the dividend, add it to 414, then carry on: 4149 / 425

Let's proceed to step 4:
4149 divided by 425 is 9 with a remainder of 324.
The next digit of our result is 9. 
Result so far: 19.0
If we subtract 3825 from 4149, we get 324.
Fetch the next digit (0) from the dividend, attach it to 324 and continue: 3240 / 425

Moving on to step 5:
When dividing 3240 by 425, we get 7 with a remainder of 265.
The next digit of our result is 7. 
Result so far: 197.0
Deduct 2975 from 3240 and we're left with 265.
Bring next digit (1) of the dividend behind the 265 and repeat the process: 2651 / 425

Let's proceed to step 6:
If we divide 2651 by 425, we get 6 and a remainder of 101.
The next digit of our result is 6. 
Result so far: 1976.0
Deduct 2550 from 2651 and we're left with 101.
Include the next digit (2) from the dividend after 101, then repeat: 1012 / 425

Moving on to step 7:
425 goes into 1012 2 times with a remainder of 162.
Put 2 as the next digit of the answer. 
Result so far: 19762.0
Subtracting 850 from 1012 leaves us with 162.
Include the next digit (2) from the dividend after 162, then repeat: 1622 / 425

On to step 8:
When dividing 1622 by 425, we get 3 with a remainder of 347.
Use 3 as the next digit of our solution. 
Result so far: 197623.0
If we subtract 1275 from 1622, we get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Going ahead to step 9:
When dividing 3470 by 425, we get 8 with a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 197623.8
Subtract 3400 from 3470 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
If we divide 700 by 425, we get 1 and a remainder of 275.
The next digit of our result is 1. 
Result so far: 197623.81
Subtracting 425 from 700 leaves us with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Going ahead to step 11:
425 can be fit into 2750 6 times, resulting in a remainder of 200.
Record the quotient 6 as the next digit in the result. 
Result so far: 197623.816
Deduct 2550 from 2750 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 12:
When dividing 2000 by 425, we get 4 with a remainder of 300.
Put 4 as the next digit of the answer. 
Result so far: 197623.8164
Deduct 1700 from 2000 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 13:
When dividing 3000 by 425, we get 7 with a remainder of 25.
Use 7 as the next digit of our solution. 
Result so far: 197623.81647
If we subtract 2975 from 3000, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 14:
If we divide 250 by 425, we get 0 and a remainder of 250.
The next digit of our result is 0. 
Result so far: 197623.81647
Subtracting 0 from 250 leaves us with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Moving on to step 15:
The number 425 fits into 2500 5 times, leaving a remainder of 375.
Write down 5 as next digit of the result. 
Result so far: 197623.8164705
Subtracting 2125 from 2500 leaves us with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Going ahead to step 16:
3750 divided by 425 is 8 with a remainder of 350.
Write down 8 as next digit of the result. 
Result so far: 197623.81647058
If we take 3400 away from 3750, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

The final result is 197623.81647058 with a remainder of 3.5e-07.