Let's divide 615988 by 15
We want to figure out the number of times 615988 can be divided by 15.

On to step 1:
6 divided by 15 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 15

Moving on to step 2:
If we divide 61 by 15, we get 4 and a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 60 from 61 and we're left with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 15

On to step 3:
15 divided by 15 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 41.0
Subtract 15 from 15 to get 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 15

Step 4:
The number 15 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 410.0
If we take 0 away from 9, we end up with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 15

Step 5:
98 divided by 15 is 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 4106.0
The remainder is 8 after subtracting 90 from 98.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 15

Going ahead to step 6:
88 divided by 15 is 5 with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 41065.0
The remainder is 13 after subtracting 75 from 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
The number 15 fits into 130 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 41065.8
Subtract 120 from 130 to 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.

On to step 8:
If we divide 100 by 15, we get 6 and a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 41065.86
Subtract 90 from 100 to 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.

Step 9:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 41065.866
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 41065.866, and the remainder is 0.001.