We're dividing 643159 by 49 
We want to divide 643159 by 49.

Going ahead to step 1:
49 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 49

Going ahead to step 2:
49 can be fit into 64 1 times, resulting in a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 49 away from 64, we end up with 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 49

On to step 3:
49 can be fit into 153 3 times, resulting in a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 13.0
The remainder is 6 after subtracting 147 from 153.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 49

On to step 4:
If we divide 61 by 49, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 131.0
Deduct 49 from 61 and we're left with 12.
Fetch the next digit (5) from the dividend, attach it to 12 and continue: 125 / 49

Advancing to step 5:
When dividing 125 by 49, we get 2 with a remainder of 27.
The number 2 becomes the next digit in our result. 
Result so far: 1312.0
If we take 98 away from 125, we end up with 27.
Grab the next digit (9) from the dividend, add it to 27, then carry on: 279 / 49

Moving on to step 6:
If we divide 279 by 49, we get 5 and a remainder of 34.
The next digit of our result is 5. 
Result so far: 13125.0
The remainder is 34 after subtracting 245 from 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 7:
If we divide 340 by 49, we get 6 and a remainder of 46.
Use 6 as the next digit of our solution. 
Result so far: 13125.6
Subtract 294 from 340 to get 46.
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:
The number 49 fits into 460 9 times, leaving a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 13125.69
Deduct 441 from 460 and we're left 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.

Advancing to step 9:
If we divide 190 by 49, we get 3 and a remainder of 43.
Use 3 as the next digit of our solution. 
Result so far: 13125.693
Deduct 147 from 190 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 10:
430 divided by 49 is 8 with a remainder of 38.
Put 8 as the next digit of the answer. 
Result so far: 13125.6938
Deduct 392 from 430 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 11:
380 divided by 49 is 7 with a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 13125.69387
Subtract 343 from 380 to 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.

Advancing to step 12:
If we divide 370 by 49, we get 7 and a remainder of 27.
The number 7 becomes the next digit in our result. 
Result so far: 13125.693877
Deduct 343 from 370 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

After the division, we end up with 13125.693877 and a remainder of 2.7e-06.