We look at the division of 42151532 by 161 
We want to divide 42151532 by 161.

Let's proceed to step 1:
161 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 161

Advancing to step 2:
161 can be fit into 42 0 times, resulting in a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 161

Advancing to step 3:
161 can be fit into 421 2 times, resulting in a remainder of 99.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 322 away from 421, we end up with 99.
Grab the next digit (5) from the dividend, add it to 99, then carry on: 995 / 161

On to step 4:
If we divide 995 by 161, we get 6 and a remainder of 29.
Write down 6 as next digit of the result. 
Result so far: 26.0
Subtracting 966 from 995 leaves us with 29.
Append the next digit (1) from the dividend to 29 and continue with: 291 / 161

Step 5:
161 can be fit into 291 1 times, resulting in a remainder of 130.
The number 1 becomes the next digit in our result. 
Result so far: 261.0
Subtracting 161 from 291 leaves us with 130.
Bring next digit (5) of the dividend behind the 130 and repeat the process: 1305 / 161

Going ahead to step 6:
161 goes into 1305 8 times with a remainder of 17.
Use 8 as the next digit of our solution. 
Result so far: 2618.0
Subtracting 1288 from 1305 leaves us with 17.
Take the next digit (3) from the dividend and append it to 17, then repeat: 173 / 161

Let's proceed to step 7:
If we divide 173 by 161, we get 1 and a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 26181.0
If we take 161 away from 173, we end up with 12.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 161

Step 8:
The number 161 fits into 122 0 times, leaving a remainder of 122.
The next digit of our result is 0. 
Result so far: 261810.0
If we take 0 away from 122, we end up with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Moving on to step 9:
161 can be fit into 1220 7 times, resulting in a remainder of 93.
Put 7 as the next digit of the answer. 
Result so far: 261810.7
If we take 1127 away from 1220, we end up 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.

Let's proceed to step 10:
If we divide 930 by 161, we get 5 and a remainder of 125.
Put 5 as the next digit of the answer. 
Result so far: 261810.75
If we subtract 805 from 930, we 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 11:
If we divide 1250 by 161, we get 7 and a remainder of 123.
Put 7 as the next digit of the answer. 
Result so far: 261810.757
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.

On to step 12:
161 can be fit into 1230 7 times, resulting in a remainder of 103.
Record the quotient 7 as the next digit in the result. 
Result so far: 261810.7577
If we subtract 1127 from 1230, we get 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1030, and continue the process.

The final outcome is 261810.7577, with a leftover of 0.00103.