85139023 divided by 646 
We want to divide 85139023 by 646.

On to step 1:
The number 646 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 646

Going ahead to step 2:
When dividing 85 by 646, we get 0 with a remainder of 85.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 85 leaves us with 85.
Take the next digit (1) from the dividend and append it to 85, then repeat: 851 / 646

Advancing to step 3:
646 can be fit into 851 1 times, resulting in a remainder of 205.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 646 from 851 and we're left with 205.
Include the next digit (3) from the dividend after 205, then repeat: 2053 / 646

Going ahead to step 4:
2053 divided by 646 is 3 with a remainder of 115.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Deduct 1938 from 2053 and we're left with 115.
Include the next digit (9) from the dividend after 115, then repeat: 1159 / 646

Let's proceed to step 5:
646 can be fit into 1159 1 times, resulting in a remainder of 513.
The number 1 becomes the next digit in our result. 
Result so far: 131.0
Subtracting 646 from 1159 leaves us with 513.
Include the next digit (0) from the dividend after 513, then repeat: 5130 / 646

Advancing to step 6:
646 goes into 5130 7 times with a remainder of 608.
The number 7 becomes the next digit in our result. 
Result so far: 1317.0
Deduct 4522 from 5130 and we're left with 608.
Take the next digit (2) from the dividend and append it to 608, then repeat: 6082 / 646

Let's proceed to step 7:
646 can be fit into 6082 9 times, resulting in a remainder of 268.
The number 9 becomes the next digit in our result. 
Result so far: 13179.0
If we take 5814 away from 6082, we end up with 268.
Include the next digit (3) from the dividend after 268, then repeat: 2683 / 646

Moving on to step 8:
646 can be fit into 2683 4 times, resulting in a remainder of 99.
Put 4 as the next digit of the answer. 
Result so far: 131794.0
Deduct 2584 from 2683 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

On to step 9:
When dividing 990 by 646, we get 1 with a remainder of 344.
The next digit of our result is 1. 
Result so far: 131794.1
If we subtract 646 from 990, we get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Step 10:
If we divide 3440 by 646, we get 5 and a remainder of 210.
Use 5 as the next digit of our solution. 
Result so far: 131794.15
The remainder is 210 after subtracting 3230 from 3440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Moving on to step 11:
2100 divided by 646 is 3 with a remainder of 162.
Put 3 as the next digit of the answer. 
Result so far: 131794.153
Subtracting 1938 from 2100 leaves us with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Step 12:
The number 646 fits into 1620 2 times, leaving a remainder of 328.
The number 2 becomes the next digit in our result. 
Result so far: 131794.1532
Deduct 1292 from 1620 and we're left with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Going ahead to step 13:
When dividing 3280 by 646, we get 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 131794.15325
If we subtract 3230 from 3280, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 14:
When dividing 500 by 646, we get 0 with a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 131794.15325
If we take 0 away from 500, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Moving on to step 15:
646 can be fit into 5000 7 times, resulting in a remainder of 478.
Record the quotient 7 as the next digit in the result. 
Result so far: 131794.1532507
If we subtract 4522 from 5000, we get 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Step 16:
646 goes into 4780 7 times with a remainder of 258.
The number 7 becomes the next digit in our result. 
Result so far: 131794.15325077
The remainder is 258 after subtracting 4522 from 4780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

After the division, we end up with 131794.15325077 and a remainder of 2.58e-07.