We divide 66172700 by 161
Our goal is to divide 66172700 by 161.

Moving on to step 1:
161 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 161

Step 2:
161 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Fetch the next digit (1) from the dividend, attach it to 66 and continue: 661 / 161

On to step 3:
If we divide 661 by 161, we get 4 and a remainder of 17.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 644 from 661, we get 17.
Grab the next digit (7) from the dividend, add it to 17, then carry on: 177 / 161

On to step 4:
177 divided by 161 is 1 with a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 41.0
If we subtract 161 from 177, we get 16.
Grab the next digit (2) from the dividend, add it to 16, then carry on: 162 / 161

Going ahead to step 5:
If we divide 162 by 161, we get 1 and a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 411.0
Subtract 161 from 162 to get 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 161

Going ahead to step 6:
161 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 4110.0
The remainder is 17 after subtracting 0 from 17.
Fetch the next digit (0) from the dividend, attach it to 17 and continue: 170 / 161

Moving on to step 7:
The number 161 fits into 170 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 41101.0
Deduct 161 from 170 and we're left with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 161

On to step 8:
When dividing 90 by 161, we get 0 with a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 411010.0
Deduct 0 from 90 and we're left 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.

On to step 9:
161 can be fit into 900 5 times, resulting in a remainder of 95.
Use 5 as the next digit of our solution. 
Result so far: 411010.5
The remainder is 95 after subtracting 805 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 10:
161 can be fit into 950 5 times, resulting in a remainder of 145.
Use 5 as the next digit of our solution. 
Result so far: 411010.55
Subtract 805 from 950 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

The final result is 411010.55 with a remainder of 0.145.