We divide 390370 by 91
We want to divide 390370 by 91.

On to step 1:
The number 91 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 91

Let's proceed to step 2:
91 goes into 39 0 times with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Grab the next digit (0) from the dividend, add it to 39, then carry on: 390 / 91

Moving on to step 3:
The number 91 fits into 390 4 times, leaving a remainder of 26.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 364 from 390 to get 26.
Grab the next digit (3) from the dividend, add it to 26, then carry on: 263 / 91

Advancing to step 4:
91 goes into 263 2 times with a remainder of 81.
Put 2 as the next digit of the answer. 
Result so far: 42.0
The remainder is 81 after subtracting 182 from 263.
Grab the next digit (7) from the dividend, add it to 81, then carry on: 817 / 91

Going ahead to step 5:
When dividing 817 by 91, we get 8 with a remainder of 89.
Put 8 as the next digit of the answer. 
Result so far: 428.0
The remainder is 89 after subtracting 728 from 817.
Grab the next digit (0) from the dividend, add it to 89, then carry on: 890 / 91

Let's proceed to step 6:
If we divide 890 by 91, we get 9 and a remainder of 71.
The next digit of our result is 9. 
Result so far: 4289.0
Subtract 819 from 890 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 7:
When dividing 710 by 91, we get 7 with a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 4289.7
The remainder is 73 after subtracting 637 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 8:
When dividing 730 by 91, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 4289.78
If we subtract 728 from 730, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
If we divide 20 by 91, we get 0 and a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 4289.78
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
91 can be fit into 200 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 4289.7802
The remainder is 18 after subtracting 182 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 11:
180 divided by 91 is 1 with a remainder of 89.
The next digit of our result is 1. 
Result so far: 4289.78021
The remainder is 89 after subtracting 91 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 12:
The number 91 fits into 890 9 times, leaving a remainder of 71.
Record the quotient 9 as the next digit in the result. 
Result so far: 4289.780219
Deduct 819 from 890 and we're left with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 13:
When dividing 710 by 91, we get 7 with a remainder of 73.
Put 7 as the next digit of the answer. 
Result so far: 4289.7802197
If we take 637 away from 710, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 14:
If we divide 730 by 91, we get 8 and a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 4289.78021978
If we take 728 away from 730, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 4289.78021978 with a remaining 2e-09.