We're dividing 65591861 by 40 
We want to figure out the number of times 65591861 can be divided by 40.

Going ahead to step 1:
When dividing 6 by 40, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 40

On to step 2:
When dividing 65 by 40, we get 1 with a remainder of 25.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 40 from 65 to get 25.
Bring next digit (5) of the dividend behind the 25 and repeat the process: 255 / 40

Going ahead to step 3:
40 can be fit into 255 6 times, resulting in a remainder of 15.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 240 from 255, we get 15.
Include the next digit (9) from the dividend after 15, then repeat: 159 / 40

Advancing to step 4:
40 can be fit into 159 3 times, resulting in a remainder of 39.
Use 3 as the next digit of our solution. 
Result so far: 163.0
If we subtract 120 from 159, we get 39.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 40

On to step 5:
40 goes into 391 9 times with a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 1639.0
If we take 360 away from 391, we end up with 31.
Take the next digit (8) from the dividend and append it to 31, then repeat: 318 / 40

Let's proceed to step 6:
40 can be fit into 318 7 times, resulting in a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 16397.0
Subtract 280 from 318 to get 38.
Fetch the next digit (6) from the dividend, attach it to 38 and continue: 386 / 40

Moving on to step 7:
The number 40 fits into 386 9 times, leaving a remainder of 26.
Write down 9 as next digit of the result. 
Result so far: 163979.0
Deduct 360 from 386 and we're left with 26.
Fetch the next digit (1) from the dividend, attach it to 26 and continue: 261 / 40

Step 8:
If we divide 261 by 40, we get 6 and a remainder of 21.
Write down 6 as next digit of the result. 
Result so far: 1639796.0
Subtracting 240 from 261 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 9:
210 divided by 40 is 5 with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 1639796.5
If we subtract 200 from 210, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
When dividing 100 by 40, we get 2 with a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 1639796.52
The remainder is 20 after subtracting 80 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 11:
40 can be fit into 200 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1639796.525
Subtract 200 from 200 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
40 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1639796.525
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 13:
The number 40 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1639796.525
The remainder is 0 after subtracting 0 from 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 quotient of the division is 1639796.525, and the remainder is 0.0.