638741 ÷ 51 
Let's see how many times 51 fits into 638741.

Advancing to step 1:
When dividing 6 by 51, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 51

Moving on to step 2:
51 can be fit into 63 1 times, resulting in a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 51 from 63 and we're left with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 51

Step 3:
51 can be fit into 128 2 times, resulting in a remainder of 26.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 102 from 128 to get 26.
Append the next digit (7) from the dividend to 26 and continue with: 267 / 51

Moving on to step 4:
When dividing 267 by 51, we get 5 with a remainder of 12.
Write down 5 as next digit of the result. 
Result so far: 125.0
Subtracting 255 from 267 leaves us with 12.
Bring next digit (4) of the dividend behind the 12 and repeat the process: 124 / 51

Step 5:
124 divided by 51 is 2 with a remainder of 22.
The number 2 becomes the next digit in our result. 
Result so far: 1252.0
If we take 102 away from 124, we end up with 22.
Include the next digit (1) from the dividend after 22, then repeat: 221 / 51

Advancing to step 6:
When dividing 221 by 51, we get 4 with a remainder of 17.
The number 4 becomes the next digit in our result. 
Result so far: 12524.0
Subtract 204 from 221 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 7:
If we divide 170 by 51, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 12524.3
If we take 153 away from 170, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 8:
If we divide 170 by 51, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 12524.33
The remainder is 17 after subtracting 153 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Our division results in 12524.33 with a remaining 0.017.