25202907 ÷ 161 
Let's see how many times 161 fits into 25202907.

Going ahead to step 1:
When dividing 2 by 161, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 161

Step 2:
The number 161 fits into 25 0 times, leaving a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Include the next digit (2) from the dividend after 25, then repeat: 252 / 161

Moving on to step 3:
161 goes into 252 1 times with a remainder of 91.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 161 from 252 to get 91.
Bring next digit (0) of the dividend behind the 91 and repeat the process: 910 / 161

Moving on to step 4:
When dividing 910 by 161, we get 5 with a remainder of 105.
The next digit of our result is 5. 
Result so far: 15.0
The remainder is 105 after subtracting 805 from 910.
Fetch the next digit (2) from the dividend, attach it to 105 and continue: 1052 / 161

Going ahead to step 5:
The number 161 fits into 1052 6 times, leaving a remainder of 86.
The number 6 becomes the next digit in our result. 
Result so far: 156.0
Deduct 966 from 1052 and we're left with 86.
Grab the next digit (9) from the dividend, add it to 86, then carry on: 869 / 161

Moving on to step 6:
161 can be fit into 869 5 times, resulting in a remainder of 64.
The next digit of our result is 5. 
Result so far: 1565.0
If we take 805 away from 869, we end up with 64.
Take the next digit (0) from the dividend and append it to 64, then repeat: 640 / 161

Advancing to step 7:
640 divided by 161 is 3 with a remainder of 157.
Use 3 as the next digit of our solution. 
Result so far: 15653.0
The remainder is 157 after subtracting 483 from 640.
Bring next digit (7) of the dividend behind the 157 and repeat the process: 1577 / 161

Let's proceed to step 8:
When dividing 1577 by 161, we get 9 with a remainder of 128.
Put 9 as the next digit of the answer. 
Result so far: 156539.0
If we take 1449 away from 1577, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

On to step 9:
161 can be fit into 1280 7 times, resulting in a remainder of 153.
The number 7 becomes the next digit in our result. 
Result so far: 156539.7
Subtract 1127 from 1280 to get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Advancing to step 10:
161 can be fit into 1530 9 times, resulting in a remainder of 81.
Record the quotient 9 as the next digit in the result. 
Result so far: 156539.79
If we take 1449 away from 1530, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 11:
810 divided by 161 is 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 156539.795
If we subtract 805 from 810, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 12:
If we divide 50 by 161, we get 0 and a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 156539.795
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 13:
If we divide 500 by 161, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 156539.79503
The remainder is 17 after subtracting 483 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 14:
170 divided by 161 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 156539.795031
Subtract 161 from 170 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 15:
The number 161 fits into 90 0 times, leaving a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 156539.795031
If we take 0 away from 90, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 16:
161 goes into 900 5 times with a remainder of 95.
Use 5 as the next digit of our solution. 
Result so far: 156539.79503105
If we subtract 805 from 900, we get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

The final outcome is 156539.79503105, with a leftover of 9.5e-08.