We divide 15972724 by 3
We're looking to find how many times 3 goes into 15972724.

Moving on to step 1:
When dividing 1 by 3, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 3

Going ahead to step 2:
The number 3 fits into 15 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 5.0
The remainder is 0 after subtracting 15 from 15.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 3

Going ahead to step 3:
3 goes into 9 3 times with a remainder of 0.
The next digit of our result is 3. 
Result so far: 53.0
If we subtract 9 from 9, we get 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 3

On to step 4:
3 goes into 7 2 times with a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 532.0
If we take 6 away from 7, we end up with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 3

Step 5:
If we divide 12 by 3, we get 4 and a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 5324.0
Subtract 12 from 12 to get 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 3

On to step 6:
7 divided by 3 is 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 53242.0
Deduct 6 from 7 and we're left with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 3

Step 7:
3 goes into 12 4 times with a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 532424.0
Deduct 12 from 12 and we're left with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 3

Advancing to step 8:
4 divided by 3 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 5324241.0
Subtract 3 from 4 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
When dividing 10 by 3, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 5324241.3
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 10:
When dividing 10 by 3, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 5324241.33
The remainder is 1 after subtracting 9 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 5324241.33, with a leftover of 0.001.