We look at the division of 90519350 by 431 
We want to figure out the number of times 90519350 can be divided by 431.

Going ahead to step 1:
431 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 431

Step 2:
The number 431 fits into 90 0 times, leaving a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Append the next digit (5) from the dividend to 90 and continue with: 905 / 431

Step 3:
If we divide 905 by 431, we get 2 and a remainder of 43.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 862 away from 905, we end up with 43.
Append the next digit (1) from the dividend to 43 and continue with: 431 / 431

Advancing to step 4:
When dividing 431 by 431, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 21.0
If we take 431 away from 431, we end up with 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 431

Step 5:
9 divided by 431 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 210.0
If we take 0 away from 9, we end up with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 431

On to step 6:
The number 431 fits into 93 0 times, leaving a remainder of 93.
Record the quotient 0 as the next digit in the result. 
Result so far: 2100.0
The remainder is 93 after subtracting 0 from 93.
Take the next digit (5) from the dividend and append it to 93, then repeat: 935 / 431

Let's proceed to step 7:
When dividing 935 by 431, we get 2 with a remainder of 73.
Put 2 as the next digit of the answer. 
Result so far: 21002.0
If we take 862 away from 935, we end up with 73.
Grab the next digit (0) from the dividend, add it to 73, then carry on: 730 / 431

Step 8:
When dividing 730 by 431, we get 1 with a remainder of 299.
Use 1 as the next digit of our solution. 
Result so far: 210021.0
Subtract 431 from 730 to get 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

On to step 9:
When dividing 2990 by 431, we get 6 with a remainder of 404.
Use 6 as the next digit of our solution. 
Result so far: 210021.6
If we subtract 2586 from 2990, we get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Let's proceed to step 10:
If we divide 4040 by 431, we get 9 and a remainder of 161.
Write down 9 as next digit of the result. 
Result so far: 210021.69
If we subtract 3879 from 4040, we get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Step 11:
The number 431 fits into 1610 3 times, leaving a remainder of 317.
Write down 3 as next digit of the result. 
Result so far: 210021.693
Subtracting 1293 from 1610 leaves us with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Going ahead to step 12:
3170 divided by 431 is 7 with a remainder of 153.
Record the quotient 7 as the next digit in the result. 
Result so far: 210021.6937
If we subtract 3017 from 3170, we get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Advancing to step 13:
431 goes into 1530 3 times with a remainder of 237.
Use 3 as the next digit of our solution. 
Result so far: 210021.69373
Subtracting 1293 from 1530 leaves us with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Let's proceed to step 14:
2370 divided by 431 is 5 with a remainder of 215.
Record the quotient 5 as the next digit in the result. 
Result so far: 210021.693735
If we subtract 2155 from 2370, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

On to step 15:
If we divide 2150 by 431, we get 4 and a remainder of 426.
Write down 4 as next digit of the result. 
Result so far: 210021.6937354
If we take 1724 away from 2150, we end up with 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Let's proceed to step 16:
The number 431 fits into 4260 9 times, leaving a remainder of 381.
Use 9 as the next digit of our solution. 
Result so far: 210021.69373549
Subtract 3879 from 4260 to get 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

After the division, we end up with 210021.69373549 and a remainder of 3.81e-07.