90666400 ÷ 570 
Our goal is to divide 90666400 by 570.

On to step 1:
570 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
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 / 570

On to step 2:
570 goes into 90 0 times with a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Take the next digit (6) from the dividend and append it to 90, then repeat: 906 / 570

Moving on to step 3:
If we divide 906 by 570, we get 1 and a remainder of 336.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 570 from 906 leaves us with 336.
Include the next digit (6) from the dividend after 336, then repeat: 3366 / 570

Moving on to step 4:
When dividing 3366 by 570, we get 5 with a remainder of 516.
The next digit of our result is 5. 
Result so far: 15.0
Deduct 2850 from 3366 and we're left with 516.
Bring next digit (6) of the dividend behind the 516 and repeat the process: 5166 / 570

Going ahead to step 5:
570 goes into 5166 9 times with a remainder of 36.
Record the quotient 9 as the next digit in the result. 
Result so far: 159.0
The remainder is 36 after subtracting 5130 from 5166.
Bring next digit (4) of the dividend behind the 36 and repeat the process: 364 / 570

Let's proceed to step 6:
When dividing 364 by 570, we get 0 with a remainder of 364.
Write down 0 as next digit of the result. 
Result so far: 1590.0
Deduct 0 from 364 and we're left with 364.
Fetch the next digit (0) from the dividend, attach it to 364 and continue: 3640 / 570

Advancing to step 7:
The number 570 fits into 3640 6 times, leaving a remainder of 220.
Put 6 as the next digit of the answer. 
Result so far: 15906.0
If we subtract 3420 from 3640, we get 220.
Include the next digit (0) from the dividend after 220, then repeat: 2200 / 570

Advancing to step 8:
570 goes into 2200 3 times with a remainder of 490.
Put 3 as the next digit of the answer. 
Result so far: 159063.0
Deduct 1710 from 2200 and we're left with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Advancing to step 9:
If we divide 4900 by 570, we get 8 and a remainder of 340.
Use 8 as the next digit of our solution. 
Result so far: 159063.8
If we subtract 4560 from 4900, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 10:
If we divide 3400 by 570, we get 5 and a remainder of 550.
Write down 5 as next digit of the result. 
Result so far: 159063.85
Subtract 2850 from 3400 to get 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

On to step 11:
570 goes into 5500 9 times with a remainder of 370.
The number 9 becomes the next digit in our result. 
Result so far: 159063.859
The remainder is 370 after subtracting 5130 from 5500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 12:
The number 570 fits into 3700 6 times, leaving a remainder of 280.
Use 6 as the next digit of our solution. 
Result so far: 159063.8596
If we subtract 3420 from 3700, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 13:
570 can be fit into 2800 4 times, resulting in a remainder of 520.
Put 4 as the next digit of the answer. 
Result so far: 159063.85964
If we subtract 2280 from 2800, we get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Step 14:
5200 divided by 570 is 9 with a remainder of 70.
Write down 9 as next digit of the result. 
Result so far: 159063.859649
If we take 5130 away from 5200, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 15:
700 divided by 570 is 1 with a remainder of 130.
The next digit of our result is 1. 
Result so far: 159063.8596491
Subtracting 570 from 700 leaves us 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.

Advancing to step 16:
570 can be fit into 1300 2 times, resulting in a remainder of 160.
Put 2 as the next digit of the answer. 
Result so far: 159063.85964912
The remainder is 160 after subtracting 1140 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

In conclusion, the division gives 159063.85964912 with a balance of 1.6e-07.