Let's divide 42157711 by 851
Let's see how many times 851 fits into 42157711.

Step 1:
When dividing 4 by 851, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 851

Let's proceed to step 2:
851 can be fit into 42 0 times, resulting in a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Take the next digit (1) from the dividend and append it to 42, then repeat: 421 / 851

Moving on to step 3:
When dividing 421 by 851, we get 0 with a remainder of 421.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 421 leaves us with 421.
Take the next digit (5) from the dividend and append it to 421, then repeat: 4215 / 851

Step 4:
If we divide 4215 by 851, we get 4 and a remainder of 811.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 811 after subtracting 3404 from 4215.
Include the next digit (7) from the dividend after 811, then repeat: 8117 / 851

Moving on to step 5:
The number 851 fits into 8117 9 times, leaving a remainder of 458.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
Subtracting 7659 from 8117 leaves us with 458.
Fetch the next digit (7) from the dividend, attach it to 458 and continue: 4587 / 851

Advancing to step 6:
If we divide 4587 by 851, we get 5 and a remainder of 332.
Write down 5 as next digit of the result. 
Result so far: 495.0
If we take 4255 away from 4587, we end up with 332.
Append the next digit (1) from the dividend to 332 and continue with: 3321 / 851

Moving on to step 7:
When dividing 3321 by 851, we get 3 with a remainder of 768.
Put 3 as the next digit of the answer. 
Result so far: 4953.0
Subtracting 2553 from 3321 leaves us with 768.
Take the next digit (1) from the dividend and append it to 768, then repeat: 7681 / 851

On to step 8:
7681 divided by 851 is 9 with a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 49539.0
Subtracting 7659 from 7681 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 9:
The number 851 fits into 220 0 times, leaving a remainder of 220.
The number 0 becomes the next digit in our result. 
Result so far: 49539.0
If we take 0 away from 220, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 10:
851 goes into 2200 2 times with a remainder of 498.
Write down 2 as next digit of the result. 
Result so far: 49539.02
The remainder is 498 after subtracting 1702 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4980, and continue the process.

On to step 11:
When dividing 4980 by 851, we get 5 with a remainder of 725.
Put 5 as the next digit of the answer. 
Result so far: 49539.025
If we take 4255 away from 4980, we end up with 725.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7250, and continue the process.

Advancing to step 12:
When dividing 7250 by 851, we get 8 with a remainder of 442.
Use 8 as the next digit of our solution. 
Result so far: 49539.0258
Subtracting 6808 from 7250 leaves us with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Step 13:
851 can be fit into 4420 5 times, resulting in a remainder of 165.
Record the quotient 5 as the next digit in the result. 
Result so far: 49539.02585
Deduct 4255 from 4420 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 14:
851 goes into 1650 1 times with a remainder of 799.
Use 1 as the next digit of our solution. 
Result so far: 49539.025851
Deduct 851 from 1650 and we're left with 799.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7990, and continue the process.

On to step 15:
851 can be fit into 7990 9 times, resulting in a remainder of 331.
The number 9 becomes the next digit in our result. 
Result so far: 49539.0258519
Subtracting 7659 from 7990 leaves us with 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

On to step 16:
The number 851 fits into 3310 3 times, leaving a remainder of 757.
Use 3 as the next digit of our solution. 
Result so far: 49539.02585193
Deduct 2553 from 3310 and we're left with 757.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7570, and continue the process.

The final outcome is 49539.02585193, with a leftover of 7.57e-07.