15725390 ÷ 397 
Our goal is to divide 15725390 by 397.

Step 1:
397 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 397

On to step 2:
397 can be fit into 15 0 times, resulting in a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Append the next digit (7) from the dividend to 15 and continue with: 157 / 397

Moving on to step 3:
157 divided by 397 is 0 with a remainder of 157.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 157 leaves us with 157.
Take the next digit (2) from the dividend and append it to 157, then repeat: 1572 / 397

Advancing to step 4:
When dividing 1572 by 397, we get 3 with a remainder of 381.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 1191 away from 1572, we end up with 381.
Bring next digit (5) of the dividend behind the 381 and repeat the process: 3815 / 397

On to step 5:
The number 397 fits into 3815 9 times, leaving a remainder of 242.
Write down 9 as next digit of the result. 
Result so far: 39.0
Subtract 3573 from 3815 to get 242.
Grab the next digit (3) from the dividend, add it to 242, then carry on: 2423 / 397

Going ahead to step 6:
If we divide 2423 by 397, we get 6 and a remainder of 41.
Record the quotient 6 as the next digit in the result. 
Result so far: 396.0
Subtracting 2382 from 2423 leaves us with 41.
Grab the next digit (9) from the dividend, add it to 41, then carry on: 419 / 397

On to step 7:
397 can be fit into 419 1 times, resulting in a remainder of 22.
The next digit of our result is 1. 
Result so far: 3961.0
If we subtract 397 from 419, we get 22.
Take the next digit (0) from the dividend and append it to 22, then repeat: 220 / 397

Step 8:
When dividing 220 by 397, we get 0 with a remainder of 220.
Record the quotient 0 as the next digit in the result. 
Result so far: 39610.0
If we subtract 0 from 220, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 9:
If we divide 2200 by 397, we get 5 and a remainder of 215.
Write down 5 as next digit of the result. 
Result so far: 39610.5
If we take 1985 away from 2200, we end up with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Moving on to step 10:
397 can be fit into 2150 5 times, resulting in a remainder of 165.
Record the quotient 5 as the next digit in the result. 
Result so far: 39610.55
Subtract 1985 from 2150 to get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

The quotient of the division is 39610.55, and the remainder is 0.165.