51581577 ÷ 161 
Our goal is to divide 51581577 by 161.

Moving on to step 1:
161 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 161

Step 2:
When dividing 51 by 161, we get 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 161

Let's proceed to step 3:
When dividing 515 by 161, we get 3 with a remainder of 32.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 483 from 515 and we're left with 32.
Include the next digit (8) from the dividend after 32, then repeat: 328 / 161

Moving on to step 4:
When dividing 328 by 161, we get 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
Subtracting 322 from 328 leaves us with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 161

Step 5:
When dividing 61 by 161, we get 0 with a remainder of 61.
Put 0 as the next digit of the answer. 
Result so far: 320.0
Subtracting 0 from 61 leaves us with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 161

On to step 6:
If we divide 615 by 161, we get 3 and a remainder of 132.
Use 3 as the next digit of our solution. 
Result so far: 3203.0
Subtract 483 from 615 to get 132.
Grab the next digit (7) from the dividend, add it to 132, then carry on: 1327 / 161

On to step 7:
The number 161 fits into 1327 8 times, leaving a remainder of 39.
Record the quotient 8 as the next digit in the result. 
Result so far: 32038.0
If we take 1288 away from 1327, we end up with 39.
Append the next digit (7) from the dividend to 39 and continue with: 397 / 161

On to step 8:
If we divide 397 by 161, we get 2 and a remainder of 75.
The number 2 becomes the next digit in our result. 
Result so far: 320382.0
Deduct 322 from 397 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 9:
If we divide 750 by 161, we get 4 and a remainder of 106.
Record the quotient 4 as the next digit in the result. 
Result so far: 320382.4
Subtracting 644 from 750 leaves us with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Advancing to step 10:
The number 161 fits into 1060 6 times, leaving a remainder of 94.
Record the quotient 6 as the next digit in the result. 
Result so far: 320382.46
If we take 966 away from 1060, we end up with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 11:
When dividing 940 by 161, we get 5 with a remainder of 135.
Put 5 as the next digit of the answer. 
Result so far: 320382.465
Deduct 805 from 940 and we're left with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

On to step 12:
161 goes into 1350 8 times with a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 320382.4658
If we subtract 1288 from 1350, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 13:
161 goes into 620 3 times with a remainder of 137.
Put 3 as the next digit of the answer. 
Result so far: 320382.46583
Deduct 483 from 620 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

On to step 14:
If we divide 1370 by 161, we get 8 and a remainder of 82.
Put 8 as the next digit of the answer. 
Result so far: 320382.465838
Subtract 1288 from 1370 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Going ahead to step 15:
If we divide 820 by 161, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 320382.4658385
Deduct 805 from 820 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 16:
161 can be fit into 150 0 times, resulting in a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 320382.4658385
If we take 0 away from 150, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The quotient of the division is 320382.4658385, and the remainder is 1.5e-07.