We look at the division of 68642490 by 40 
We're looking to find how many times 40 goes into 68642490.

Step 1:
40 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 40

Let's proceed to step 2:
If we divide 68 by 40, we get 1 and a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 28 after subtracting 40 from 68.
Include the next digit (6) from the dividend after 28, then repeat: 286 / 40

Moving on to step 3:
When dividing 286 by 40, we get 7 with a remainder of 6.
Put 7 as the next digit of the answer. 
Result so far: 17.0
Subtract 280 from 286 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 40

Advancing to step 4:
64 divided by 40 is 1 with a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 171.0
Subtract 40 from 64 to get 24.
Include the next digit (2) from the dividend after 24, then repeat: 242 / 40

Let's proceed to step 5:
40 goes into 242 6 times with a remainder of 2.
The next digit of our result is 6. 
Result so far: 1716.0
If we take 240 away from 242, we end up with 2.
Fetch the next digit (4) from the dividend, attach it to 2 and continue: 24 / 40

Let's proceed to step 6:
When dividing 24 by 40, we get 0 with a remainder of 24.
Write down 0 as next digit of the result. 
Result so far: 17160.0
Subtracting 0 from 24 leaves us with 24.
Append the next digit (9) from the dividend to 24 and continue with: 249 / 40

Going ahead to step 7:
If we divide 249 by 40, we get 6 and a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 171606.0
If we subtract 240 from 249, we get 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 40

On to step 8:
40 goes into 90 2 times with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 1716062.0
The remainder is 10 after subtracting 80 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
100 divided by 40 is 2 with a remainder of 20.
The next digit of our result is 2. 
Result so far: 1716062.2
Subtract 80 from 100 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
When dividing 200 by 40, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 1716062.25
Deduct 200 from 200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
When dividing 0 by 40, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1716062.25
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 12:
40 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1716062.25
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 1716062.25 with a remainder of 0.0.