217571 ÷ 42 
We want to figure out the number of times 217571 can be divided by 42.

On to step 1:
42 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 42

Let's proceed to step 2:
The number 42 fits into 21 0 times, leaving a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (7) from the dividend and append it to 21, then repeat: 217 / 42

Step 3:
42 goes into 217 5 times with a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtracting 210 from 217 leaves us with 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 42

Moving on to step 4:
When dividing 75 by 42, we get 1 with a remainder of 33.
Put 1 as the next digit of the answer. 
Result so far: 51.0
If we take 42 away from 75, we end up with 33.
Append the next digit (7) from the dividend to 33 and continue with: 337 / 42

Let's proceed to step 5:
42 goes into 337 8 times with a remainder of 1.
The next digit of our result is 8. 
Result so far: 518.0
The remainder is 1 after subtracting 336 from 337.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 42

Advancing to step 6:
When dividing 11 by 42, we get 0 with a remainder of 11.
Write down 0 as next digit of the result. 
Result so far: 5180.0
If we subtract 0 from 11, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
110 divided by 42 is 2 with a remainder of 26.
Put 2 as the next digit of the answer. 
Result so far: 5180.2
Deduct 84 from 110 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 8:
If we divide 260 by 42, we get 6 and a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 5180.26
Subtracting 252 from 260 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
When dividing 80 by 42, we get 1 with a remainder of 38.
The next digit of our result is 1. 
Result so far: 5180.261
The remainder is 38 after subtracting 42 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
380 divided by 42 is 9 with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 5180.2619
If we take 378 away from 380, 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.

Let's proceed to step 11:
When dividing 20 by 42, we get 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 5180.2619
Deduct 0 from 20 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.

Let's proceed to step 12:
200 divided by 42 is 4 with a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 5180.261904
If we take 168 away from 200, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 13:
If we divide 320 by 42, we get 7 and a remainder of 26.
The next digit of our result is 7. 
Result so far: 5180.2619047
Subtracting 294 from 320 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 14:
The number 42 fits into 260 6 times, leaving a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 5180.26190476
If we take 252 away from 260, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 5180.26190476, with a leftover of 8e-09.