We're dividing 42366849 by 581 
We want to figure out the number of times 42366849 can be divided by 581.

On to step 1:
581 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 581

Advancing to step 2:
581 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Append the next digit (3) from the dividend to 42 and continue with: 423 / 581

On to step 3:
When dividing 423 by 581, we get 0 with a remainder of 423.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 423, we get 423.
Bring next digit (6) of the dividend behind the 423 and repeat the process: 4236 / 581

Going ahead to step 4:
581 can be fit into 4236 7 times, resulting in a remainder of 169.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 4067 away from 4236, we end up with 169.
Fetch the next digit (6) from the dividend, attach it to 169 and continue: 1696 / 581

Moving on to step 5:
If we divide 1696 by 581, we get 2 and a remainder of 534.
Write down 2 as next digit of the result. 
Result so far: 72.0
The remainder is 534 after subtracting 1162 from 1696.
Include the next digit (8) from the dividend after 534, then repeat: 5348 / 581

Advancing to step 6:
The number 581 fits into 5348 9 times, leaving a remainder of 119.
Write down 9 as next digit of the result. 
Result so far: 729.0
If we subtract 5229 from 5348, we get 119.
Take the next digit (4) from the dividend and append it to 119, then repeat: 1194 / 581

Step 7:
581 goes into 1194 2 times with a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 7292.0
If we take 1162 away from 1194, we end up with 32.
Include the next digit (9) from the dividend after 32, then repeat: 329 / 581

Let's proceed to step 8:
If we divide 329 by 581, we get 0 and a remainder of 329.
The next digit of our result is 0. 
Result so far: 72920.0
The remainder is 329 after subtracting 0 from 329.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3290, and continue the process.

Advancing to step 9:
581 can be fit into 3290 5 times, resulting in a remainder of 385.
Use 5 as the next digit of our solution. 
Result so far: 72920.5
If we subtract 2905 from 3290, we get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Let's proceed to step 10:
581 goes into 3850 6 times with a remainder of 364.
Record the quotient 6 as the next digit in the result. 
Result so far: 72920.56
Subtract 3486 from 3850 to get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 11:
The number 581 fits into 3640 6 times, leaving a remainder of 154.
The number 6 becomes the next digit in our result. 
Result so far: 72920.566
If we subtract 3486 from 3640, we get 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Our division results in 72920.566 with a remaining 0.0154.