We're dividing 15315780 by 15 
Our goal is to divide 15315780 by 15.

Step 1:
1 divided by 15 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 15

Moving on to step 2:
If we divide 15 by 15, we get 1 and a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 15 from 15, we get 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 15

Step 3:
15 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 15

Step 4:
15 can be fit into 31 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 102.0
If we take 30 away from 31, we end up with 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 15

On to step 5:
15 divided by 15 is 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1021.0
The remainder is 0 after subtracting 15 from 15.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 15

Step 6:
If we divide 7 by 15, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 10210.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 15

Going ahead to step 7:
15 can be fit into 78 5 times, resulting in a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 102105.0
The remainder is 3 after subtracting 75 from 78.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 15

Step 8:
When dividing 30 by 15, we get 2 with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 1021052.0
The remainder is 0 after subtracting 30 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
15 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: 1021052.0
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 10:
15 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1021052.0
If we take 0 away from 0, we end up 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 1021052.0 with a remainder of 0.0.