85910389 divided by 345 
Let's see how many times 345 fits into 85910389.

Going ahead to step 1:
345 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 345

Let's proceed to step 2:
If we divide 85 by 345, we get 0 and a remainder of 85.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 85 and we're left with 85.
Grab the next digit (9) from the dividend, add it to 85, then carry on: 859 / 345

Going ahead to step 3:
859 divided by 345 is 2 with a remainder of 169.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 690 from 859, we get 169.
Grab the next digit (1) from the dividend, add it to 169, then carry on: 1691 / 345

Moving on to step 4:
The number 345 fits into 1691 4 times, leaving a remainder of 311.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Deduct 1380 from 1691 and we're left with 311.
Include the next digit (0) from the dividend after 311, then repeat: 3110 / 345

On to step 5:
3110 divided by 345 is 9 with a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 249.0
Subtract 3105 from 3110 to get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 345

Let's proceed to step 6:
The number 345 fits into 53 0 times, leaving a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 2490.0
Subtracting 0 from 53 leaves us with 53.
Fetch the next digit (8) from the dividend, attach it to 53 and continue: 538 / 345

On to step 7:
345 can be fit into 538 1 times, resulting in a remainder of 193.
The next digit of our result is 1. 
Result so far: 24901.0
Subtracting 345 from 538 leaves us with 193.
Append the next digit (9) from the dividend to 193 and continue with: 1939 / 345

Let's proceed to step 8:
345 goes into 1939 5 times with a remainder of 214.
Write down 5 as next digit of the result. 
Result so far: 249015.0
Deduct 1725 from 1939 and we're left with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Let's proceed to step 9:
2140 divided by 345 is 6 with a remainder of 70.
The number 6 becomes the next digit in our result. 
Result so far: 249015.6
The remainder is 70 after subtracting 2070 from 2140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
When dividing 700 by 345, we get 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 249015.62
If we take 690 away from 700, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 11:
The number 345 fits into 100 0 times, leaving a remainder of 100.
The next digit of our result is 0. 
Result so far: 249015.62
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 12:
1000 divided by 345 is 2 with a remainder of 310.
Put 2 as the next digit of the answer. 
Result so far: 249015.6202
Subtracting 690 from 1000 leaves us with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Step 13:
345 can be fit into 3100 8 times, resulting in a remainder of 340.
The number 8 becomes the next digit in our result. 
Result so far: 249015.62028
The remainder is 340 after subtracting 2760 from 3100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 14:
3400 divided by 345 is 9 with a remainder of 295.
Record the quotient 9 as the next digit in the result. 
Result so far: 249015.620289
If we subtract 3105 from 3400, we get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Step 15:
345 goes into 2950 8 times with a remainder of 190.
Write down 8 as next digit of the result. 
Result so far: 249015.6202898
If we take 2760 away from 2950, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Advancing to step 16:
When dividing 1900 by 345, we get 5 with a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 249015.62028985
If we subtract 1725 from 1900, we get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

The final result is 249015.62028985 with a remainder of 1.75e-07.