858161 divided by 43 
We want to figure out the number of times 858161 can be divided by 43.

Step 1:
43 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 43

Let's proceed to step 2:
If we divide 85 by 43, we get 1 and a remainder of 42.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 43 from 85 leaves us with 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 43

Moving on to step 3:
43 goes into 428 9 times with a remainder of 41.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we subtract 387 from 428, we get 41.
Append the next digit (1) from the dividend to 41 and continue with: 411 / 43

On to step 4:
When dividing 411 by 43, we get 9 with a remainder of 24.
The next digit of our result is 9. 
Result so far: 199.0
If we subtract 387 from 411, we get 24.
Include the next digit (6) from the dividend after 24, then repeat: 246 / 43

Let's proceed to step 5:
If we divide 246 by 43, we get 5 and a remainder of 31.
Write down 5 as next digit of the result. 
Result so far: 1995.0
Subtracting 215 from 246 leaves us with 31.
Append the next digit (1) from the dividend to 31 and continue with: 311 / 43

Step 6:
311 divided by 43 is 7 with a remainder of 10.
The next digit of our result is 7. 
Result so far: 19957.0
Deduct 301 from 311 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
When dividing 100 by 43, we get 2 with a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 19957.2
Deduct 86 from 100 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 8:
If we divide 140 by 43, we get 3 and a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 19957.23
Subtracting 129 from 140 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 9:
43 can be fit into 110 2 times, resulting in a remainder of 24.
The number 2 becomes the next digit in our result. 
Result so far: 19957.232
If we take 86 away from 110, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
240 divided by 43 is 5 with a remainder of 25.
Use 5 as the next digit of our solution. 
Result so far: 19957.2325
The remainder is 25 after subtracting 215 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 11:
43 goes into 250 5 times with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 19957.23255
Subtract 215 from 250 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final result is 19957.23255 with a remainder of 3.5e-05.