40815725 ÷ 840 
Let's see how many times 840 fits into 40815725.

Step 1:
When dividing 4 by 840, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 840

Let's proceed to step 2:
40 divided by 840 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 40 and we're left with 40.
Append the next digit (8) from the dividend to 40 and continue with: 408 / 840

Let's proceed to step 3:
The number 840 fits into 408 0 times, leaving a remainder of 408.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 408 and we're left with 408.
Take the next digit (1) from the dividend and append it to 408, then repeat: 4081 / 840

Going ahead to step 4:
The number 840 fits into 4081 4 times, leaving a remainder of 721.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 3360 from 4081 leaves us with 721.
Include the next digit (5) from the dividend after 721, then repeat: 7215 / 840

Moving on to step 5:
840 goes into 7215 8 times with a remainder of 495.
Write down 8 as next digit of the result. 
Result so far: 48.0
Subtract 6720 from 7215 to get 495.
Append the next digit (7) from the dividend to 495 and continue with: 4957 / 840

Going ahead to step 6:
840 can be fit into 4957 5 times, resulting in a remainder of 757.
Write down 5 as next digit of the result. 
Result so far: 485.0
If we take 4200 away from 4957, we end up with 757.
Fetch the next digit (2) from the dividend, attach it to 757 and continue: 7572 / 840

Moving on to step 7:
7572 divided by 840 is 9 with a remainder of 12.
Record the quotient 9 as the next digit in the result. 
Result so far: 4859.0
If we take 7560 away from 7572, we end up with 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 840

Step 8:
When dividing 125 by 840, we get 0 with a remainder of 125.
Put 0 as the next digit of the answer. 
Result so far: 48590.0
If we take 0 away from 125, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Advancing to step 9:
If we divide 1250 by 840, we get 1 and a remainder of 410.
Use 1 as the next digit of our solution. 
Result so far: 48590.1
Subtract 840 from 1250 to get 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Step 10:
840 can be fit into 4100 4 times, resulting in a remainder of 740.
The next digit of our result is 4. 
Result so far: 48590.14
Subtracting 3360 from 4100 leaves us with 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

Moving on to step 11:
When dividing 7400 by 840, we get 8 with a remainder of 680.
Put 8 as the next digit of the answer. 
Result so far: 48590.148
Deduct 6720 from 7400 and we're left with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

On to step 12:
6800 divided by 840 is 8 with a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 48590.1488
Deduct 6720 from 6800 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

After the division, we end up with 48590.1488 and a remainder of 0.0008.