90171970 divided by 558 
We want to figure out the number of times 90171970 can be divided by 558.

Step 1:
9 divided by 558 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 558

Let's proceed to step 2:
If we divide 90 by 558, we get 0 and a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Take the next digit (1) from the dividend and append it to 90, then repeat: 901 / 558

On to step 3:
901 divided by 558 is 1 with a remainder of 343.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 343 after subtracting 558 from 901.
Grab the next digit (7) from the dividend, add it to 343, then carry on: 3437 / 558

Moving on to step 4:
558 goes into 3437 6 times with a remainder of 89.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtract 3348 from 3437 to get 89.
Take the next digit (1) from the dividend and append it to 89, then repeat: 891 / 558

Going ahead to step 5:
If we divide 891 by 558, we get 1 and a remainder of 333.
The number 1 becomes the next digit in our result. 
Result so far: 161.0
If we subtract 558 from 891, we get 333.
Bring next digit (9) of the dividend behind the 333 and repeat the process: 3339 / 558

Advancing to step 6:
558 goes into 3339 5 times with a remainder of 549.
The next digit of our result is 5. 
Result so far: 1615.0
If we take 2790 away from 3339, we end up with 549.
Bring next digit (7) of the dividend behind the 549 and repeat the process: 5497 / 558

Step 7:
558 goes into 5497 9 times with a remainder of 475.
The number 9 becomes the next digit in our result. 
Result so far: 16159.0
Subtract 5022 from 5497 to get 475.
Bring next digit (0) of the dividend behind the 475 and repeat the process: 4750 / 558

Advancing to step 8:
4750 divided by 558 is 8 with a remainder of 286.
The number 8 becomes the next digit in our result. 
Result so far: 161598.0
Subtract 4464 from 4750 to get 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

On to step 9:
If we divide 2860 by 558, we get 5 and a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 161598.5
Subtract 2790 from 2860 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 10:
558 goes into 700 1 times with a remainder of 142.
Write down 1 as next digit of the result. 
Result so far: 161598.51
If we subtract 558 from 700, we get 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Step 11:
If we divide 1420 by 558, we get 2 and a remainder of 304.
Use 2 as the next digit of our solution. 
Result so far: 161598.512
If we subtract 1116 from 1420, we get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Let's proceed to step 12:
558 can be fit into 3040 5 times, resulting in a remainder of 250.
Use 5 as the next digit of our solution. 
Result so far: 161598.5125
Subtract 2790 from 3040 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 13:
If we divide 2500 by 558, we get 4 and a remainder of 268.
Put 4 as the next digit of the answer. 
Result so far: 161598.51254
Subtracting 2232 from 2500 leaves us with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

On to step 14:
If we divide 2680 by 558, we get 4 and a remainder of 448.
The number 4 becomes the next digit in our result. 
Result so far: 161598.512544
Deduct 2232 from 2680 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

After the division, we end up with 161598.512544 and a remainder of 4.48e-05.