Let's divide 857903 by 66
We want to figure out the number of times 857903 can be divided by 66.

Let's proceed to step 1:
The number 66 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 66

On to step 2:
The number 66 fits into 85 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 66 from 85 leaves us with 19.
Grab the next digit (7) from the dividend, add it to 19, then carry on: 197 / 66

On to step 3:
If we divide 197 by 66, we get 2 and a remainder of 65.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 132 from 197 to get 65.
Take the next digit (9) from the dividend and append it to 65, then repeat: 659 / 66

Let's proceed to step 4:
When dividing 659 by 66, we get 9 with a remainder of 65.
The next digit of our result is 9. 
Result so far: 129.0
Deduct 594 from 659 and we're left with 65.
Take the next digit (0) from the dividend and append it to 65, then repeat: 650 / 66

Advancing to step 5:
66 goes into 650 9 times with a remainder of 56.
The next digit of our result is 9. 
Result so far: 1299.0
Subtracting 594 from 650 leaves us with 56.
Grab the next digit (3) from the dividend, add it to 56, then carry on: 563 / 66

On to step 6:
If we divide 563 by 66, we get 8 and a remainder of 35.
Record the quotient 8 as the next digit in the result. 
Result so far: 12998.0
The remainder is 35 after subtracting 528 from 563.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 7:
350 divided by 66 is 5 with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 12998.5
Deduct 330 from 350 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 8:
66 goes into 200 3 times with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 12998.53
Subtract 198 from 200 to 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 66, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 12998.53
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
The number 66 fits into 200 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 12998.5303
Deduct 198 from 200 and we're left 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.

Advancing to step 11:
20 divided by 66 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 12998.5303
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
When dividing 200 by 66, we get 3 with a remainder of 2.
The next digit of our result is 3. 
Result so far: 12998.530303
If we take 198 away from 200, 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.

On to step 13:
20 divided by 66 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 12998.530303
If we take 0 away from 20, we end up 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.

Step 14:
When dividing 200 by 66, we get 3 with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 12998.53030303
Deduct 198 from 200 and we're left 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.

The final outcome is 12998.53030303, with a leftover of 2e-09.