We're dividing 217820 by 51 
Let's see how many times 51 fits into 217820.

Advancing to step 1:
If we divide 2 by 51, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 51

Going ahead to step 2:
21 divided by 51 is 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Grab the next digit (7) from the dividend, add it to 21, then carry on: 217 / 51

Moving on to step 3:
51 goes into 217 4 times with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 204 from 217 and we're left with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 51

On to step 4:
If we divide 138 by 51, we get 2 and a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we take 102 away from 138, we end up with 36.
Grab the next digit (2) from the dividend, add it to 36, then carry on: 362 / 51

Moving on to step 5:
When dividing 362 by 51, we get 7 with a remainder of 5.
The next digit of our result is 7. 
Result so far: 427.0
The remainder is 5 after subtracting 357 from 362.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 51

Going ahead to step 6:
The number 51 fits into 50 0 times, leaving a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 4270.0
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 7:
500 divided by 51 is 9 with a remainder of 41.
Record the quotient 9 as the next digit in the result. 
Result so far: 4270.9
The remainder is 41 after subtracting 459 from 500.
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 8:
410 divided by 51 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 4270.98
If we take 408 away from 410, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
When dividing 20 by 51, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 4270.98
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
51 goes into 200 3 times with a remainder of 47.
The next digit of our result is 3. 
Result so far: 4270.9803
Deduct 153 from 200 and we're left 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.

Moving on to step 11:
If we divide 470 by 51, we get 9 and a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 4270.98039
Subtract 459 from 470 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 12:
If we divide 110 by 51, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 4270.980392
The remainder is 8 after subtracting 102 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 13:
80 divided by 51 is 1 with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 4270.9803921
The remainder is 29 after subtracting 51 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 14:
290 divided by 51 is 5 with a remainder of 35.
The next digit of our result is 5. 
Result so far: 4270.98039215
If we subtract 255 from 290, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final result is 4270.98039215 with a remainder of 3.5e-08.