We look at the division of 120503 by 51 
Let's see how many times 51 fits into 120503.

Moving on to step 1:
51 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 51

Going ahead to step 2:
If we divide 12 by 51, we get 0 and a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 51

Moving on to step 3:
51 can be fit into 120 2 times, resulting in a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 102 from 120 to get 18.
Fetch the next digit (5) from the dividend, attach it to 18 and continue: 185 / 51

Going ahead to step 4:
If we divide 185 by 51, we get 3 and a remainder of 32.
The next digit of our result is 3. 
Result so far: 23.0
Deduct 153 from 185 and we're left with 32.
Grab the next digit (0) from the dividend, add it to 32, then carry on: 320 / 51

Advancing to step 5:
When dividing 320 by 51, we get 6 with a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 236.0
Subtracting 306 from 320 leaves us with 14.
Grab the next digit (3) from the dividend, add it to 14, then carry on: 143 / 51

Going ahead to step 6:
143 divided by 51 is 2 with a remainder of 41.
Put 2 as the next digit of the answer. 
Result so far: 2362.0
The remainder is 41 after subtracting 102 from 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 7:
The number 51 fits into 410 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 2362.8
The remainder is 2 after subtracting 408 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
20 divided by 51 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 2362.8
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
51 can be fit into 200 3 times, resulting in a remainder of 47.
Write down 3 as next digit of the result. 
Result so far: 2362.803
If we take 153 away from 200, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 10:
The number 51 fits into 470 9 times, leaving a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 2362.8039
Subtracting 459 from 470 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
If we divide 110 by 51, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 2362.80392
Subtracting 102 from 110 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 12:
If we divide 80 by 51, we get 1 and a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 2362.803921
If we take 51 away from 80, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 13:
51 goes into 290 5 times with a remainder of 35.
Write down 5 as next digit of the result. 
Result so far: 2362.8039215
The remainder is 35 after subtracting 255 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 14:
If we divide 350 by 51, we get 6 and a remainder of 44.
Write down 6 as next digit of the result. 
Result so far: 2362.80392156
Deduct 306 from 350 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 2362.80392156, with a leftover of 4.4e-08.