215761 ÷ 42 
We want to figure out the number of times 215761 can be divided by 42.

Moving on to step 1:
42 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 42

Let's proceed to step 2:
When dividing 21 by 42, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 42

Moving on to step 3:
215 divided by 42 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 210 from 215, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 42

Advancing to step 4:
42 can be fit into 57 1 times, resulting in a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 51.0
If we take 42 away from 57, we end up with 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 42

Let's proceed to step 5:
If we divide 156 by 42, we get 3 and a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 513.0
Deduct 126 from 156 and we're left with 30.
Include the next digit (1) from the dividend after 30, then repeat: 301 / 42

Going ahead to step 6:
The number 42 fits into 301 7 times, leaving a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 5137.0
Deduct 294 from 301 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
42 can be fit into 70 1 times, resulting in a remainder of 28.
Put 1 as the next digit of the answer. 
Result so far: 5137.1
If we subtract 42 from 70, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 8:
42 can be fit into 280 6 times, resulting in a remainder of 28.
Put 6 as the next digit of the answer. 
Result so far: 5137.16
Subtracting 252 from 280 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 9:
The number 42 fits into 280 6 times, leaving a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 5137.166
Subtract 252 from 280 to get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 5137.166 and a remainder of 0.0028.