Let's divide 387639 by 91
We want to figure out the number of times 387639 can be divided by 91.

Moving on to step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 91

Moving on to step 2:
When dividing 38 by 91, we get 0 with a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 38 after subtracting 0 from 38.
Append the next digit (7) from the dividend to 38 and continue with: 387 / 91

Let's proceed to step 3:
If we divide 387 by 91, we get 4 and a remainder of 23.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 23 after subtracting 364 from 387.
Grab the next digit (6) from the dividend, add it to 23, then carry on: 236 / 91

On to step 4:
If we divide 236 by 91, we get 2 and a remainder of 54.
Put 2 as the next digit of the answer. 
Result so far: 42.0
If we take 182 away from 236, we end up with 54.
Take the next digit (3) from the dividend and append it to 54, then repeat: 543 / 91

Step 5:
91 goes into 543 5 times with a remainder of 88.
Write down 5 as next digit of the result. 
Result so far: 425.0
Subtract 455 from 543 to get 88.
Append the next digit (9) from the dividend to 88 and continue with: 889 / 91

Going ahead to step 6:
When dividing 889 by 91, we get 9 with a remainder of 70.
Record the quotient 9 as the next digit in the result. 
Result so far: 4259.0
Deduct 819 from 889 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 7:
91 goes into 700 7 times with a remainder of 63.
The number 7 becomes the next digit in our result. 
Result so far: 4259.7
Deduct 637 from 700 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Going ahead to step 8:
630 divided by 91 is 6 with a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 4259.76
The remainder is 84 after subtracting 546 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 9:
When dividing 840 by 91, we get 9 with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 4259.769
Deduct 819 from 840 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
91 can be fit into 210 2 times, resulting in a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 4259.7692
If we subtract 182 from 210, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 11:
91 can be fit into 280 3 times, resulting in a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 4259.76923
If we take 273 away from 280, we end up with 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 12:
The number 91 fits into 70 0 times, leaving a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 4259.76923
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 13:
91 goes into 700 7 times with a remainder of 63.
Put 7 as the next digit of the answer. 
Result so far: 4259.7692307
The remainder is 63 after subtracting 637 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 14:
If we divide 630 by 91, we get 6 and a remainder of 84.
Put 6 as the next digit of the answer. 
Result so far: 4259.76923076
Subtracting 546 from 630 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

The final result is 4259.76923076 with a remainder of 8.4e-08.