We're dividing 643742 by 49 
We want to divide 643742 by 49.

Moving on to step 1:
The number 49 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 49

Moving on to step 2:
49 goes into 64 1 times with a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 15 after subtracting 49 from 64.
Take the next digit (3) from the dividend and append it to 15, then repeat: 153 / 49

Going ahead to step 3:
153 divided by 49 is 3 with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 147 from 153 to get 6.
Fetch the next digit (7) from the dividend, attach it to 6 and continue: 67 / 49

On to step 4:
67 divided by 49 is 1 with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 131.0
Subtract 49 from 67 to get 18.
Fetch the next digit (4) from the dividend, attach it to 18 and continue: 184 / 49

Step 5:
If we divide 184 by 49, we get 3 and a remainder of 37.
Put 3 as the next digit of the answer. 
Result so far: 1313.0
The remainder is 37 after subtracting 147 from 184.
Take the next digit (2) from the dividend and append it to 37, then repeat: 372 / 49

Going ahead to step 6:
372 divided by 49 is 7 with a remainder of 29.
Record the quotient 7 as the next digit in the result. 
Result so far: 13137.0
Subtract 343 from 372 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 7:
If we divide 290 by 49, we get 5 and a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 13137.5
If we take 245 away from 290, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 8:
When dividing 450 by 49, we get 9 with a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 13137.59
If we subtract 441 from 450, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 9:
The number 49 fits into 90 1 times, leaving a remainder of 41.
The number 1 becomes the next digit in our result. 
Result so far: 13137.591
Deduct 49 from 90 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Moving on to step 10:
49 goes into 410 8 times with a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 13137.5918
Subtracting 392 from 410 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
49 goes into 180 3 times with a remainder of 33.
The next digit of our result is 3. 
Result so far: 13137.59183
If we subtract 147 from 180, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 12:
If we divide 330 by 49, we get 6 and a remainder of 36.
The next digit of our result is 6. 
Result so far: 13137.591836
Subtracting 294 from 330 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 13:
The number 49 fits into 360 7 times, leaving a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 13137.5918367
Subtracting 343 from 360 leaves us 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.

Let's proceed to step 14:
When dividing 170 by 49, we get 3 with a remainder of 23.
Put 3 as the next digit of the answer. 
Result so far: 13137.59183673
Subtract 147 from 170 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

The final outcome is 13137.59183673, with a leftover of 2.3e-08.