Let's divide 639070 by 91
We're looking to find how many times 91 goes into 639070.

Going ahead to step 1:
91 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 91

Step 2:
The number 91 fits into 63 0 times, leaving a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 63 after subtracting 0 from 63.
Bring next digit (9) of the dividend behind the 63 and repeat the process: 639 / 91

Let's proceed to step 3:
91 can be fit into 639 7 times, resulting in a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 637 from 639 leaves us with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 91

Let's proceed to step 4:
91 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 70.0
The remainder is 20 after subtracting 0 from 20.
Include the next digit (7) from the dividend after 20, then repeat: 207 / 91

Moving on to step 5:
The number 91 fits into 207 2 times, leaving a remainder of 25.
Record the quotient 2 as the next digit in the result. 
Result so far: 702.0
Subtracting 182 from 207 leaves us with 25.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 91

On to step 6:
91 goes into 250 2 times with a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 7022.0
The remainder is 68 after subtracting 182 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 7:
91 goes into 680 7 times with a remainder of 43.
The number 7 becomes the next digit in our result. 
Result so far: 7022.7
The remainder is 43 after subtracting 637 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 8:
The number 91 fits into 430 4 times, leaving a remainder of 66.
The number 4 becomes the next digit in our result. 
Result so far: 7022.74
Subtract 364 from 430 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 9:
If we divide 660 by 91, we get 7 and a remainder of 23.
The next digit of our result is 7. 
Result so far: 7022.747
Subtracting 637 from 660 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 10:
91 can be fit into 230 2 times, resulting in a remainder of 48.
The number 2 becomes the next digit in our result. 
Result so far: 7022.7472
The remainder is 48 after subtracting 182 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 11:
If we divide 480 by 91, we get 5 and a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 7022.74725
If we take 455 away from 480, we end up 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.

Let's proceed to step 12:
91 can be fit into 250 2 times, resulting in a remainder of 68.
The next digit of our result is 2. 
Result so far: 7022.747252
Subtracting 182 from 250 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 13:
680 divided by 91 is 7 with a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 7022.7472527
If we take 637 away from 680, 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.

On to step 14:
The number 91 fits into 430 4 times, leaving a remainder of 66.
Use 4 as the next digit of our solution. 
Result so far: 7022.74725274
If we take 364 away from 430, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

In conclusion, the division gives 7022.74725274 with a balance of 6.6e-08.