90571612 divided by 870 
We want to figure out the number of times 90571612 can be divided by 870.

Step 1:
When dividing 9 by 870, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 870

Advancing to step 2:
870 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Include the next digit (5) from the dividend after 90, then repeat: 905 / 870

Let's proceed to step 3:
The number 870 fits into 905 1 times, leaving a remainder of 35.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 870 from 905 leaves us with 35.
Bring next digit (7) of the dividend behind the 35 and repeat the process: 357 / 870

Moving on to step 4:
If we divide 357 by 870, we get 0 and a remainder of 357.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 357 after subtracting 0 from 357.
Take the next digit (1) from the dividend and append it to 357, then repeat: 3571 / 870

On to step 5:
The number 870 fits into 3571 4 times, leaving a remainder of 91.
Write down 4 as next digit of the result. 
Result so far: 104.0
Deduct 3480 from 3571 and we're left with 91.
Include the next digit (6) from the dividend after 91, then repeat: 916 / 870

Going ahead to step 6:
870 goes into 916 1 times with a remainder of 46.
The next digit of our result is 1. 
Result so far: 1041.0
The remainder is 46 after subtracting 870 from 916.
Take the next digit (1) from the dividend and append it to 46, then repeat: 461 / 870

Step 7:
870 can be fit into 461 0 times, resulting in a remainder of 461.
Put 0 as the next digit of the answer. 
Result so far: 10410.0
If we subtract 0 from 461, we get 461.
Take the next digit (2) from the dividend and append it to 461, then repeat: 4612 / 870

Step 8:
4612 divided by 870 is 5 with a remainder of 262.
Use 5 as the next digit of our solution. 
Result so far: 104105.0
Deduct 4350 from 4612 and we're left with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Moving on to step 9:
870 goes into 2620 3 times with a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 104105.3
The remainder is 10 after subtracting 2610 from 2620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
When dividing 100 by 870, we get 0 with a remainder of 100.
The next digit of our result is 0. 
Result so far: 104105.3
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 11:
If we divide 1000 by 870, we get 1 and a remainder of 130.
Write down 1 as next digit of the result. 
Result so far: 104105.301
Deduct 870 from 1000 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Moving on to step 12:
If we divide 1300 by 870, we get 1 and a remainder of 430.
Put 1 as the next digit of the answer. 
Result so far: 104105.3011
Deduct 870 from 1300 and we're left with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

The quotient of the division is 104105.3011, and the remainder is 0.0043.