51366297 divided by 42 
Our goal is to divide 51366297 by 42.

Moving on to step 1:
42 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 42

Moving on to step 2:
The number 42 fits into 51 1 times, leaving a remainder of 9.
The next digit of our result is 1. 
Result so far: 1.0
If we take 42 away from 51, we end up with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 42

Advancing to step 3:
93 divided by 42 is 2 with a remainder of 9.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 84 from 93 leaves us with 9.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 42

On to step 4:
If we divide 96 by 42, we get 2 and a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 122.0
Subtracting 84 from 96 leaves us with 12.
Take the next digit (6) from the dividend and append it to 12, then repeat: 126 / 42

Let's proceed to step 5:
The number 42 fits into 126 3 times, leaving a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 1223.0
If we take 126 away from 126, we end up with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 42

Going ahead to step 6:
When dividing 2 by 42, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 12230.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 42

Step 7:
When dividing 29 by 42, we get 0 with a remainder of 29.
The next digit of our result is 0. 
Result so far: 122300.0
Subtracting 0 from 29 leaves us with 29.
Grab the next digit (7) from the dividend, add it to 29, then carry on: 297 / 42

Let's proceed to step 8:
42 can be fit into 297 7 times, resulting in a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 1223007.0
The remainder is 3 after subtracting 294 from 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
When dividing 30 by 42, we get 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 1223007.0
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 10:
300 divided by 42 is 7 with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 1223007.07
Subtract 294 from 300 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 11:
When dividing 60 by 42, we get 1 with a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 1223007.071
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 12:
42 goes into 180 4 times with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 1223007.0714
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 13:
42 can be fit into 120 2 times, resulting in a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 1223007.07142
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 14:
42 can be fit into 360 8 times, resulting in a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 1223007.071428
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 15:
If we divide 240 by 42, we get 5 and a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 1223007.0714285
Subtract 210 from 240 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 16:
300 divided by 42 is 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 1223007.07142857
Deduct 294 from 300 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 1223007.07142857 with a remainder of 6e-09.