86194170 ÷ 558 
We want to figure out the number of times 86194170 can be divided by 558.

Going ahead to step 1:
558 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 558

On to step 2:
When dividing 86 by 558, we get 0 with a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Bring next digit (1) of the dividend behind the 86 and repeat the process: 861 / 558

Going ahead to step 3:
If we divide 861 by 558, we get 1 and a remainder of 303.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 558 from 861, we get 303.
Take the next digit (9) from the dividend and append it to 303, then repeat: 3039 / 558

Going ahead to step 4:
When dividing 3039 by 558, we get 5 with a remainder of 249.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 249 after subtracting 2790 from 3039.
Grab the next digit (4) from the dividend, add it to 249, then carry on: 2494 / 558

Moving on to step 5:
558 can be fit into 2494 4 times, resulting in a remainder of 262.
Write down 4 as next digit of the result. 
Result so far: 154.0
Deduct 2232 from 2494 and we're left with 262.
Take the next digit (1) from the dividend and append it to 262, then repeat: 2621 / 558

Moving on to step 6:
When dividing 2621 by 558, we get 4 with a remainder of 389.
The number 4 becomes the next digit in our result. 
Result so far: 1544.0
Subtracting 2232 from 2621 leaves us with 389.
Bring next digit (7) of the dividend behind the 389 and repeat the process: 3897 / 558

Moving on to step 7:
3897 divided by 558 is 6 with a remainder of 549.
The next digit of our result is 6. 
Result so far: 15446.0
Deduct 3348 from 3897 and we're left with 549.
Include the next digit (0) from the dividend after 549, then repeat: 5490 / 558

Moving on to step 8:
558 can be fit into 5490 9 times, resulting in a remainder of 468.
Use 9 as the next digit of our solution. 
Result so far: 154469.0
If we subtract 5022 from 5490, we get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Step 9:
558 goes into 4680 8 times with a remainder of 216.
Use 8 as the next digit of our solution. 
Result so far: 154469.8
If we take 4464 away from 4680, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Let's proceed to step 10:
2160 divided by 558 is 3 with a remainder of 486.
The number 3 becomes the next digit in our result. 
Result so far: 154469.83
If we subtract 1674 from 2160, we get 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

Let's proceed to step 11:
When dividing 4860 by 558, we get 8 with a remainder of 396.
The number 8 becomes the next digit in our result. 
Result so far: 154469.838
Subtracting 4464 from 4860 leaves us with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Going ahead to step 12:
When dividing 3960 by 558, we get 7 with a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 154469.8387
Subtract 3906 from 3960 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 13:
558 can be fit into 540 0 times, resulting in a remainder of 540.
Use 0 as the next digit of our solution. 
Result so far: 154469.8387
If we subtract 0 from 540, we get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Let's proceed to step 14:
558 goes into 5400 9 times with a remainder of 378.
Record the quotient 9 as the next digit in the result. 
Result so far: 154469.838709
Subtracting 5022 from 5400 leaves us with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Step 15:
The number 558 fits into 3780 6 times, leaving a remainder of 432.
Use 6 as the next digit of our solution. 
Result so far: 154469.8387096
If we take 3348 away from 3780, we end up with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

On to step 16:
If we divide 4320 by 558, we get 7 and a remainder of 414.
Record the quotient 7 as the next digit in the result. 
Result so far: 154469.83870967
Subtracting 3906 from 4320 leaves us with 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

After the division, we end up with 154469.83870967 and a remainder of 4.14e-07.