20010870 divided by 90 
Let's see how many times 90 fits into 20010870.

Advancing to step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 90

On to step 2:
When dividing 20 by 90, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Include the next digit (0) from the dividend after 20, then repeat: 200 / 90

Advancing to step 3:
200 divided by 90 is 2 with a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 180 from 200 and we're left with 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 90

On to step 4:
90 can be fit into 201 2 times, resulting in a remainder of 21.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtract 180 from 201 to get 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 90

Moving on to step 5:
90 goes into 210 2 times with a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 222.0
Deduct 180 from 210 and we're left with 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 90

Going ahead to step 6:
90 goes into 308 3 times with a remainder of 38.
Write down 3 as next digit of the result. 
Result so far: 2223.0
Deduct 270 from 308 and we're left with 38.
Bring next digit (7) of the dividend behind the 38 and repeat the process: 387 / 90

Advancing to step 7:
90 can be fit into 387 4 times, resulting in a remainder of 27.
Write down 4 as next digit of the result. 
Result so far: 22234.0
If we take 360 away from 387, we end up with 27.
Take the next digit (0) from the dividend and append it to 27, then repeat: 270 / 90

Step 8:
The number 90 fits into 270 3 times, leaving a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 222343.0
If we take 270 away from 270, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
90 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 222343.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
The number 90 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 222343.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 222343.0, and the remainder is 0.0.