25161720 ÷ 357 
We want to divide 25161720 by 357.

On to step 1:
The number 357 fits into 2 0 times, leaving a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 357

Let's proceed to step 2:
357 can be fit into 25 0 times, resulting in a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Include the next digit (1) from the dividend after 25, then repeat: 251 / 357

Advancing to step 3:
357 goes into 251 0 times with a remainder of 251.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 251, we get 251.
Fetch the next digit (6) from the dividend, attach it to 251 and continue: 2516 / 357

Moving on to step 4:
2516 divided by 357 is 7 with a remainder of 17.
The next digit of our result is 7. 
Result so far: 7.0
If we subtract 2499 from 2516, we get 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 357

Going ahead to step 5:
357 can be fit into 171 0 times, resulting in a remainder of 171.
The number 0 becomes the next digit in our result. 
Result so far: 70.0
Subtracting 0 from 171 leaves us with 171.
Fetch the next digit (7) from the dividend, attach it to 171 and continue: 1717 / 357

Step 6:
1717 divided by 357 is 4 with a remainder of 289.
Record the quotient 4 as the next digit in the result. 
Result so far: 704.0
Deduct 1428 from 1717 and we're left with 289.
Append the next digit (2) from the dividend to 289 and continue with: 2892 / 357

Let's proceed to step 7:
2892 divided by 357 is 8 with a remainder of 36.
The next digit of our result is 8. 
Result so far: 7048.0
Deduct 2856 from 2892 and we're left with 36.
Take the next digit (0) from the dividend and append it to 36, then repeat: 360 / 357

Step 8:
If we divide 360 by 357, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 70481.0
Subtracting 357 from 360 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
357 goes into 30 0 times with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 70481.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 10:
When dividing 300 by 357, we get 0 with a remainder of 300.
Record the quotient 0 as the next digit in the result. 
Result so far: 70481.0
If we subtract 0 from 300, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final result is 70481.0 with a remainder of 0.3.