42520395 divided by 31 
We want to figure out the number of times 42520395 can be divided by 31.

Moving on to step 1:
When dividing 4 by 31, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 31

Step 2:
42 divided by 31 is 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 31 from 42 and we're left with 11.
Include the next digit (5) from the dividend after 11, then repeat: 115 / 31

Advancing to step 3:
31 can be fit into 115 3 times, resulting in a remainder of 22.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we subtract 93 from 115, we get 22.
Bring next digit (2) of the dividend behind the 22 and repeat the process: 222 / 31

Step 4:
When dividing 222 by 31, we get 7 with a remainder of 5.
The next digit of our result is 7. 
Result so far: 137.0
If we take 217 away from 222, we end up with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 31

Step 5:
The number 31 fits into 50 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1371.0
Subtract 31 from 50 to get 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 31

Step 6:
When dividing 193 by 31, we get 6 with a remainder of 7.
Put 6 as the next digit of the answer. 
Result so far: 13716.0
Subtract 186 from 193 to get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 31

Step 7:
31 can be fit into 79 2 times, resulting in a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 137162.0
Deduct 62 from 79 and we're left with 17.
Append the next digit (5) from the dividend to 17 and continue with: 175 / 31

Going ahead to step 8:
If we divide 175 by 31, we get 5 and a remainder of 20.
The number 5 becomes the next digit in our result. 
Result so far: 1371625.0
If we take 155 away from 175, we end up 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 9:
200 divided by 31 is 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 1371625.6
Subtract 186 from 200 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 10:
31 goes into 140 4 times with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 1371625.64
The remainder is 16 after subtracting 124 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
The number 31 fits into 160 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 1371625.645
Deduct 155 from 160 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
The number 31 fits into 50 1 times, leaving a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1371625.6451
The remainder is 19 after subtracting 31 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 13:
The number 31 fits into 190 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 1371625.64516
Deduct 186 from 190 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
When dividing 40 by 31, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1371625.645161
The remainder is 9 after subtracting 31 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 15:
When dividing 90 by 31, we get 2 with a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 1371625.6451612
Subtract 62 from 90 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.

On to step 16:
31 can be fit into 280 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 1371625.64516129
Deduct 279 from 280 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Our division results in 1371625.64516129 with a remaining 1e-09.