We're dividing 19640161 by 161 
We want to figure out the number of times 19640161 can be divided by 161.

Advancing to step 1:
When dividing 1 by 161, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 161

On to step 2:
19 divided by 161 is 0 with a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 19 leaves us with 19.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 161

Step 3:
When dividing 196 by 161, we get 1 with a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 161 from 196, we get 35.
Fetch the next digit (4) from the dividend, attach it to 35 and continue: 354 / 161

On to step 4:
161 goes into 354 2 times with a remainder of 32.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 32 after subtracting 322 from 354.
Append the next digit (0) from the dividend to 32 and continue with: 320 / 161

On to step 5:
320 divided by 161 is 1 with a remainder of 159.
Put 1 as the next digit of the answer. 
Result so far: 121.0
If we take 161 away from 320, we end up with 159.
Include the next digit (1) from the dividend after 159, then repeat: 1591 / 161

Advancing to step 6:
161 goes into 1591 9 times with a remainder of 142.
Put 9 as the next digit of the answer. 
Result so far: 1219.0
If we subtract 1449 from 1591, we get 142.
Fetch the next digit (6) from the dividend, attach it to 142 and continue: 1426 / 161

Moving on to step 7:
When dividing 1426 by 161, we get 8 with a remainder of 138.
Use 8 as the next digit of our solution. 
Result so far: 12198.0
Subtracting 1288 from 1426 leaves us with 138.
Bring next digit (1) of the dividend behind the 138 and repeat the process: 1381 / 161

Going ahead to step 8:
161 can be fit into 1381 8 times, resulting in a remainder of 93.
Record the quotient 8 as the next digit in the result. 
Result so far: 121988.0
Deduct 1288 from 1381 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

On to step 9:
161 goes into 930 5 times with a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 121988.5
Subtract 805 from 930 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 10:
The number 161 fits into 1250 7 times, leaving a remainder of 123.
Record the quotient 7 as the next digit in the result. 
Result so far: 121988.57
Subtracting 1127 from 1250 leaves us with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Moving on to step 11:
1230 divided by 161 is 7 with a remainder of 103.
Write down 7 as next digit of the result. 
Result so far: 121988.577
Deduct 1127 from 1230 and we're left with 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

After the division, we end up with 121988.577 and a remainder of 0.0103.