378783 ÷ 51 
Let's see how many times 51 fits into 378783.

Let's proceed to step 1:
When dividing 3 by 51, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 51

Step 2:
51 can be fit into 37 0 times, resulting in a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 37 after subtracting 0 from 37.
Bring next digit (8) of the dividend behind the 37 and repeat the process: 378 / 51

Step 3:
If we divide 378 by 51, we get 7 and a remainder of 21.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 357 from 378 to get 21.
Bring next digit (7) of the dividend behind the 21 and repeat the process: 217 / 51

Moving on to step 4:
When dividing 217 by 51, we get 4 with a remainder of 13.
Use 4 as the next digit of our solution. 
Result so far: 74.0
Deduct 204 from 217 and we're left with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 51

Advancing to step 5:
If we divide 138 by 51, we get 2 and a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 742.0
If we take 102 away from 138, we end up with 36.
Append the next digit (3) from the dividend to 36 and continue with: 363 / 51

Step 6:
When dividing 363 by 51, we get 7 with a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 7427.0
Subtracting 357 from 363 leaves us 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.

Going ahead to step 7:
If we divide 60 by 51, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 7427.1
Subtract 51 from 60 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 8:
90 divided by 51 is 1 with a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 7427.11
Subtracting 51 from 90 leaves us with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

After the division, we end up with 7427.11 and a remainder of 0.039.