2590170 ÷ 20 
We're looking to find how many times 20 goes into 2590170.

On to step 1:
20 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 20

Let's proceed to step 2:
20 can be fit into 25 1 times, resulting in a remainder of 5.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 20 from 25 and we're left with 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 20

Moving on to step 3:
20 goes into 59 2 times with a remainder of 19.
Use 2 as the next digit of our solution. 
Result so far: 12.0
The remainder is 19 after subtracting 40 from 59.
Append the next digit (0) from the dividend to 19 and continue with: 190 / 20

On to step 4:
190 divided by 20 is 9 with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
If we take 180 away from 190, we end up with 10.
Grab the next digit (1) from the dividend, add it to 10, then carry on: 101 / 20

Going ahead to step 5:
20 goes into 101 5 times with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 1295.0
If we subtract 100 from 101, we get 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 20

Moving on to step 6:
17 divided by 20 is 0 with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 12950.0
If we subtract 0 from 17, we get 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 20

Advancing to step 7:
20 can be fit into 170 8 times, resulting in a remainder of 10.
The next digit of our result is 8. 
Result so far: 129508.0
Subtracting 160 from 170 leaves us with 10.
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 8:
20 goes into 100 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 129508.5
Subtract 100 from 100 to get 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 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 129508.5
Subtracting 0 from 0 leaves us 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.

Moving on to step 10:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 129508.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 129508.5 and a remainder of 0.0.