We look at the division of 21554938 by 51 
We're looking to find how many times 51 goes into 21554938.

Moving on to step 1:
2 divided by 51 is 0 with 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.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 51

Step 2:
21 divided by 51 is 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 51

Advancing to step 3:
51 can be fit into 215 4 times, resulting in a remainder of 11.
The next digit of our result is 4. 
Result so far: 4.0
If we take 204 away from 215, we end up with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 51

On to step 4:
If we divide 115 by 51, we get 2 and a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
Deduct 102 from 115 and we're left with 13.
Grab the next digit (4) from the dividend, add it to 13, then carry on: 134 / 51

Let's proceed to step 5:
When dividing 134 by 51, we get 2 with a remainder of 32.
Use 2 as the next digit of our solution. 
Result so far: 422.0
The remainder is 32 after subtracting 102 from 134.
Take the next digit (9) from the dividend and append it to 32, then repeat: 329 / 51

Going ahead to step 6:
The number 51 fits into 329 6 times, leaving a remainder of 23.
Write down 6 as next digit of the result. 
Result so far: 4226.0
If we subtract 306 from 329, we get 23.
Bring next digit (3) of the dividend behind the 23 and repeat the process: 233 / 51

On to step 7:
When dividing 233 by 51, we get 4 with a remainder of 29.
The next digit of our result is 4. 
Result so far: 42264.0
Subtracting 204 from 233 leaves us with 29.
Fetch the next digit (8) from the dividend, attach it to 29 and continue: 298 / 51

Advancing to step 8:
If we divide 298 by 51, we get 5 and a remainder of 43.
Use 5 as the next digit of our solution. 
Result so far: 422645.0
Deduct 255 from 298 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 9:
51 goes into 430 8 times with a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 422645.8
The remainder is 22 after subtracting 408 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 10:
When dividing 220 by 51, we get 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 422645.84
The remainder is 16 after subtracting 204 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 11:
If we divide 160 by 51, we get 3 and a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 422645.843
The remainder is 7 after subtracting 153 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 12:
51 can be fit into 70 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 422645.8431
Subtracting 51 from 70 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 13:
190 divided by 51 is 3 with a remainder of 37.
Record the quotient 3 as the next digit in the result. 
Result so far: 422645.84313
If we subtract 153 from 190, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 14:
The number 51 fits into 370 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 422645.843137
Subtracting 357 from 370 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 15:
The number 51 fits into 130 2 times, leaving a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 422645.8431372
If we subtract 102 from 130, we 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.

Let's proceed to step 16:
280 divided by 51 is 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 422645.84313725
Subtract 255 from 280 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Our division results in 422645.84313725 with a remaining 2.5e-08.