We look at the division of 90645961 by 170 
We want to figure out the number of times 90645961 can be divided by 170.

On to step 1:
170 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 170

On to step 2:
If we divide 90 by 170, we get 0 and a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Grab the next digit (6) from the dividend, add it to 90, then carry on: 906 / 170

Let's proceed to step 3:
If we divide 906 by 170, we get 5 and a remainder of 56.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 850 away from 906, we end up with 56.
Take the next digit (4) from the dividend and append it to 56, then repeat: 564 / 170

Advancing to step 4:
The number 170 fits into 564 3 times, leaving a remainder of 54.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
The remainder is 54 after subtracting 510 from 564.
Bring next digit (5) of the dividend behind the 54 and repeat the process: 545 / 170

Advancing to step 5:
170 goes into 545 3 times with a remainder of 35.
Put 3 as the next digit of the answer. 
Result so far: 533.0
Subtracting 510 from 545 leaves us with 35.
Grab the next digit (9) from the dividend, add it to 35, then carry on: 359 / 170

Step 6:
When dividing 359 by 170, we get 2 with a remainder of 19.
The next digit of our result is 2. 
Result so far: 5332.0
The remainder is 19 after subtracting 340 from 359.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 170

Going ahead to step 7:
196 divided by 170 is 1 with a remainder of 26.
The next digit of our result is 1. 
Result so far: 53321.0
Subtracting 170 from 196 leaves us with 26.
Include the next digit (1) from the dividend after 26, then repeat: 261 / 170

Going ahead to step 8:
The number 170 fits into 261 1 times, leaving a remainder of 91.
The number 1 becomes the next digit in our result. 
Result so far: 533211.0
Subtract 170 from 261 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Step 9:
170 goes into 910 5 times with a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 533211.5
Subtract 850 from 910 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 10:
The number 170 fits into 600 3 times, leaving a remainder of 90.
The number 3 becomes the next digit in our result. 
Result so far: 533211.53
If we subtract 510 from 600, we get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 11:
If we divide 900 by 170, we get 5 and a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 533211.535
Subtract 850 from 900 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 12:
500 divided by 170 is 2 with a remainder of 160.
Write down 2 as next digit of the result. 
Result so far: 533211.5352
Subtract 340 from 500 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 13:
If we divide 1600 by 170, we get 9 and a remainder of 70.
Write down 9 as next digit of the result. 
Result so far: 533211.53529
Subtracting 1530 from 1600 leaves us 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.

Step 14:
If we divide 700 by 170, we get 4 and a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 533211.535294
If we take 680 away from 700, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 15:
170 goes into 200 1 times with a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 533211.5352941
Subtracting 170 from 200 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 16:
170 can be fit into 300 1 times, resulting in a remainder of 130.
Record the quotient 1 as the next digit in the result. 
Result so far: 533211.53529411
Subtracting 170 from 300 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.

The quotient of the division is 533211.53529411, and the remainder is 1.3e-07.