We divide 45123857 by 431
Our goal is to divide 45123857 by 431.

On to step 1:
The number 431 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 431

Advancing to step 2:
When dividing 45 by 431, we get 0 with a remainder of 45.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Take the next digit (1) from the dividend and append it to 45, then repeat: 451 / 431

Moving on to step 3:
431 goes into 451 1 times with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 431 away from 451, we end up with 20.
Grab the next digit (2) from the dividend, add it to 20, then carry on: 202 / 431

Going ahead to step 4:
431 goes into 202 0 times with a remainder of 202.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 202, we get 202.
Include the next digit (3) from the dividend after 202, then repeat: 2023 / 431

Step 5:
431 can be fit into 2023 4 times, resulting in a remainder of 299.
Use 4 as the next digit of our solution. 
Result so far: 104.0
If we take 1724 away from 2023, we end up with 299.
Fetch the next digit (8) from the dividend, attach it to 299 and continue: 2998 / 431

On to step 6:
431 can be fit into 2998 6 times, resulting in a remainder of 412.
Write down 6 as next digit of the result. 
Result so far: 1046.0
Subtracting 2586 from 2998 leaves us with 412.
Fetch the next digit (5) from the dividend, attach it to 412 and continue: 4125 / 431

Step 7:
If we divide 4125 by 431, we get 9 and a remainder of 246.
Record the quotient 9 as the next digit in the result. 
Result so far: 10469.0
If we take 3879 away from 4125, we end up with 246.
Take the next digit (7) from the dividend and append it to 246, then repeat: 2467 / 431

Moving on to step 8:
431 can be fit into 2467 5 times, resulting in a remainder of 312.
The next digit of our result is 5. 
Result so far: 104695.0
Subtract 2155 from 2467 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Let's proceed to step 9:
431 can be fit into 3120 7 times, resulting in a remainder of 103.
Put 7 as the next digit of the answer. 
Result so far: 104695.7
Deduct 3017 from 3120 and we're left with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

Let's proceed to step 10:
431 can be fit into 1030 2 times, resulting in a remainder of 168.
The next digit of our result is 2. 
Result so far: 104695.72
Subtracting 862 from 1030 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Step 11:
431 can be fit into 1680 3 times, resulting in a remainder of 387.
Write down 3 as next digit of the result. 
Result so far: 104695.723
Subtracting 1293 from 1680 leaves us with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Going ahead to step 12:
431 goes into 3870 8 times with a remainder of 422.
Record the quotient 8 as the next digit in the result. 
Result so far: 104695.7238
Subtract 3448 from 3870 to get 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Going ahead to step 13:
When dividing 4220 by 431, we get 9 with a remainder of 341.
Use 9 as the next digit of our solution. 
Result so far: 104695.72389
Deduct 3879 from 4220 and we're left with 341.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3410, and continue the process.

Step 14:
If we divide 3410 by 431, we get 7 and a remainder of 393.
The number 7 becomes the next digit in our result. 
Result so far: 104695.723897
Subtract 3017 from 3410 to get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Going ahead to step 15:
The number 431 fits into 3930 9 times, leaving a remainder of 51.
The number 9 becomes the next digit in our result. 
Result so far: 104695.7238979
The remainder is 51 after subtracting 3879 from 3930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 16:
431 can be fit into 510 1 times, resulting in a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 104695.72389791
The remainder is 79 after subtracting 431 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

The final result is 104695.72389791 with a remainder of 7.9e-08.