We look at the division of 51123366 by 349 
We want to divide 51123366 by 349.

Moving on to step 1:
349 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 349

Let's proceed to step 2:
If we divide 51 by 349, we get 0 and a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Grab the next digit (1) from the dividend, add it to 51, then carry on: 511 / 349

Going ahead to step 3:
349 goes into 511 1 times with a remainder of 162.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 162 after subtracting 349 from 511.
Bring next digit (2) of the dividend behind the 162 and repeat the process: 1622 / 349

Moving on to step 4:
When dividing 1622 by 349, we get 4 with a remainder of 226.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
If we subtract 1396 from 1622, we get 226.
Include the next digit (3) from the dividend after 226, then repeat: 2263 / 349

Let's proceed to step 5:
The number 349 fits into 2263 6 times, leaving a remainder of 169.
Write down 6 as next digit of the result. 
Result so far: 146.0
The remainder is 169 after subtracting 2094 from 2263.
Include the next digit (3) from the dividend after 169, then repeat: 1693 / 349

Moving on to step 6:
When dividing 1693 by 349, we get 4 with a remainder of 297.
Put 4 as the next digit of the answer. 
Result so far: 1464.0
Deduct 1396 from 1693 and we're left with 297.
Include the next digit (6) from the dividend after 297, then repeat: 2976 / 349

Step 7:
2976 divided by 349 is 8 with a remainder of 184.
The next digit of our result is 8. 
Result so far: 14648.0
If we take 2792 away from 2976, we end up with 184.
Take the next digit (6) from the dividend and append it to 184, then repeat: 1846 / 349

On to step 8:
349 can be fit into 1846 5 times, resulting in a remainder of 101.
The number 5 becomes the next digit in our result. 
Result so far: 146485.0
If we take 1745 away from 1846, we end up with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Step 9:
When dividing 1010 by 349, we get 2 with a remainder of 312.
Put 2 as the next digit of the answer. 
Result so far: 146485.2
Deduct 698 from 1010 and we're left with 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 10:
If we divide 3120 by 349, we get 8 and a remainder of 328.
Use 8 as the next digit of our solution. 
Result so far: 146485.28
If we subtract 2792 from 3120, 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.

On to step 11:
If we divide 3280 by 349, we get 9 and a remainder of 139.
Put 9 as the next digit of the answer. 
Result so far: 146485.289
Deduct 3141 from 3280 and we're left with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Advancing to step 12:
349 goes into 1390 3 times with a remainder of 343.
The next digit of our result is 3. 
Result so far: 146485.2893
Subtract 1047 from 1390 to get 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Let's proceed to step 13:
If we divide 3430 by 349, we get 9 and a remainder of 289.
Record the quotient 9 as the next digit in the result. 
Result so far: 146485.28939
If we take 3141 away from 3430, we end up with 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Going ahead to step 14:
2890 divided by 349 is 8 with a remainder of 98.
Put 8 as the next digit of the answer. 
Result so far: 146485.289398
Deduct 2792 from 2890 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Going ahead to step 15:
980 divided by 349 is 2 with a remainder of 282.
The next digit of our result is 2. 
Result so far: 146485.2893982
If we subtract 698 from 980, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Advancing to step 16:
349 can be fit into 2820 8 times, resulting in a remainder of 28.
The next digit of our result is 8. 
Result so far: 146485.28939828
Subtract 2792 from 2820 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final outcome is 146485.28939828, with a leftover of 2.8e-08.