We're dividing 801643 by 51 
We want to divide 801643 by 51.

Let's proceed to step 1:
51 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 51

Let's proceed to step 2:
When dividing 80 by 51, we get 1 with a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 51 from 80 and we're left with 29.
Include the next digit (1) from the dividend after 29, then repeat: 291 / 51

Let's proceed to step 3:
51 goes into 291 5 times with a remainder of 36.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
Deduct 255 from 291 and we're left with 36.
Fetch the next digit (6) from the dividend, attach it to 36 and continue: 366 / 51

On to step 4:
51 goes into 366 7 times with a remainder of 9.
Put 7 as the next digit of the answer. 
Result so far: 157.0
If we take 357 away from 366, we end up with 9.
Include the next digit (4) from the dividend after 9, then repeat: 94 / 51

Moving on to step 5:
51 goes into 94 1 times with a remainder of 43.
Write down 1 as next digit of the result. 
Result so far: 1571.0
If we take 51 away from 94, we end up with 43.
Include the next digit (3) from the dividend after 43, then repeat: 433 / 51

Going ahead to step 6:
51 can be fit into 433 8 times, resulting in a remainder of 25.
Record the quotient 8 as the next digit in the result. 
Result so far: 15718.0
Subtracting 408 from 433 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 7:
250 divided by 51 is 4 with a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 15718.4
The remainder is 46 after subtracting 204 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
If we divide 460 by 51, we get 9 and a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 15718.49
Subtract 459 from 460 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 9:
10 divided by 51 is 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 15718.49
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
100 divided by 51 is 1 with a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 15718.4901
Subtract 51 from 100 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

On to step 11:
490 divided by 51 is 9 with a remainder of 31.
Use 9 as the next digit of our solution. 
Result so far: 15718.49019
The remainder is 31 after subtracting 459 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 12:
51 goes into 310 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 15718.490196
Subtracting 306 from 310 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
51 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 15718.490196
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 14:
400 divided by 51 is 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 15718.49019607
If we take 357 away from 400, we end up 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.

The quotient of the division is 15718.49019607, and the remainder is 4.3e-08.