643273 ÷ 39 
We want to divide 643273 by 39.

Moving on to step 1:
The number 39 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 39

Step 2:
The number 39 fits into 64 1 times, leaving a remainder of 25.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 39 from 64, we get 25.
Append the next digit (3) from the dividend to 25 and continue with: 253 / 39

Moving on to step 3:
39 can be fit into 253 6 times, resulting in a remainder of 19.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Deduct 234 from 253 and we're left with 19.
Bring next digit (2) of the dividend behind the 19 and repeat the process: 192 / 39

Advancing to step 4:
39 goes into 192 4 times with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 164.0
Subtract 156 from 192 to get 36.
Bring next digit (7) of the dividend behind the 36 and repeat the process: 367 / 39

Moving on to step 5:
39 can be fit into 367 9 times, resulting in a remainder of 16.
Record the quotient 9 as the next digit in the result. 
Result so far: 1649.0
If we take 351 away from 367, we end up with 16.
Take the next digit (3) from the dividend and append it to 16, then repeat: 163 / 39

Moving on to step 6:
39 can be fit into 163 4 times, resulting in a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 16494.0
Subtract 156 from 163 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
70 divided by 39 is 1 with a remainder of 31.
The next digit of our result is 1. 
Result so far: 16494.1
Subtracting 39 from 70 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Let's proceed to step 8:
If we divide 310 by 39, we get 7 and a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 16494.17
Subtract 273 from 310 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.

Let's proceed to step 9:
39 goes into 370 9 times with a remainder of 19.
Write down 9 as next digit of the result. 
Result so far: 16494.179
The remainder is 19 after subtracting 351 from 370.
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 10:
39 goes into 190 4 times with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 16494.1794
If we subtract 156 from 190, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 11:
The number 39 fits into 340 8 times, leaving a remainder of 28.
Put 8 as the next digit of the answer. 
Result so far: 16494.17948
Deduct 312 from 340 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 12:
39 can be fit into 280 7 times, resulting in a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 16494.179487
Subtract 273 from 280 to get 7.
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 13:
39 goes into 70 1 times with a remainder of 31.
The next digit of our result is 1. 
Result so far: 16494.1794871
Subtract 39 from 70 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 14:
310 divided by 39 is 7 with a remainder of 37.
Use 7 as the next digit of our solution. 
Result so far: 16494.17948717
The remainder is 37 after subtracting 273 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Our division results in 16494.17948717 with a remaining 3.7e-08.