42885103 ÷ 811 
Our goal is to divide 42885103 by 811.

On to step 1:
If we divide 4 by 811, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 811

Advancing to step 2:
811 can be fit into 42 0 times, resulting in a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (8) from the dividend after 42, then repeat: 428 / 811

On to step 3:
When dividing 428 by 811, we get 0 with a remainder of 428.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 428 to get 428.
Bring next digit (8) of the dividend behind the 428 and repeat the process: 4288 / 811

Advancing to step 4:
When dividing 4288 by 811, we get 5 with a remainder of 233.
Put 5 as the next digit of the answer. 
Result so far: 5.0
The remainder is 233 after subtracting 4055 from 4288.
Grab the next digit (5) from the dividend, add it to 233, then carry on: 2335 / 811

On to step 5:
The number 811 fits into 2335 2 times, leaving a remainder of 713.
Put 2 as the next digit of the answer. 
Result so far: 52.0
Subtracting 1622 from 2335 leaves us with 713.
Append the next digit (1) from the dividend to 713 and continue with: 7131 / 811

On to step 6:
The number 811 fits into 7131 8 times, leaving a remainder of 643.
Put 8 as the next digit of the answer. 
Result so far: 528.0
If we take 6488 away from 7131, we end up with 643.
Grab the next digit (0) from the dividend, add it to 643, then carry on: 6430 / 811

Moving on to step 7:
The number 811 fits into 6430 7 times, leaving a remainder of 753.
Use 7 as the next digit of our solution. 
Result so far: 5287.0
Subtract 5677 from 6430 to get 753.
Take the next digit (3) from the dividend and append it to 753, then repeat: 7533 / 811

Going ahead to step 8:
7533 divided by 811 is 9 with a remainder of 234.
Use 9 as the next digit of our solution. 
Result so far: 52879.0
The remainder is 234 after subtracting 7299 from 7533.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

On to step 9:
If we divide 2340 by 811, we get 2 and a remainder of 718.
Write down 2 as next digit of the result. 
Result so far: 52879.2
If we take 1622 away from 2340, we end up with 718.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7180, and continue the process.

Moving on to step 10:
7180 divided by 811 is 8 with a remainder of 692.
The next digit of our result is 8. 
Result so far: 52879.28
Deduct 6488 from 7180 and we're left with 692.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6920, and continue the process.

Let's proceed to step 11:
When dividing 6920 by 811, we get 8 with a remainder of 432.
Record the quotient 8 as the next digit in the result. 
Result so far: 52879.288
Deduct 6488 from 6920 and we're left with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

The quotient of the division is 52879.288, and the remainder is 0.0432.