We're dividing 1660898 by 640 
We want to divide 1660898 by 640.

Moving on to step 1:
1 divided by 640 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 640

On to step 2:
The number 640 fits into 16 0 times, leaving a remainder of 16.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 16 and we're left with 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 640

Step 3:
When dividing 166 by 640, we get 0 with a remainder of 166.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 166 leaves us with 166.
Fetch the next digit (0) from the dividend, attach it to 166 and continue: 1660 / 640

Let's proceed to step 4:
640 can be fit into 1660 2 times, resulting in a remainder of 380.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 1280 from 1660 and we're left with 380.
Take the next digit (8) from the dividend and append it to 380, then repeat: 3808 / 640

Advancing to step 5:
3808 divided by 640 is 5 with a remainder of 608.
Write down 5 as next digit of the result. 
Result so far: 25.0
Subtract 3200 from 3808 to get 608.
Append the next digit (9) from the dividend to 608 and continue with: 6089 / 640

On to step 6:
640 can be fit into 6089 9 times, resulting in a remainder of 329.
Record the quotient 9 as the next digit in the result. 
Result so far: 259.0
The remainder is 329 after subtracting 5760 from 6089.
Append the next digit (8) from the dividend to 329 and continue with: 3298 / 640

Advancing to step 7:
When dividing 3298 by 640, we get 5 with a remainder of 98.
Record the quotient 5 as the next digit in the result. 
Result so far: 2595.0
Deduct 3200 from 3298 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 8:
640 goes into 980 1 times with a remainder of 340.
Write down 1 as next digit of the result. 
Result so far: 2595.1
Subtract 640 from 980 to 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.

Advancing to step 9:
If we divide 3400 by 640, we get 5 and a remainder of 200.
Record the quotient 5 as the next digit in the result. 
Result so far: 2595.15
If we take 3200 away from 3400, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
When dividing 2000 by 640, we get 3 with a remainder of 80.
Write down 3 as next digit of the result. 
Result so far: 2595.153
If we take 1920 away from 2000, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 11:
640 goes into 800 1 times with a remainder of 160.
Use 1 as the next digit of our solution. 
Result so far: 2595.1531
If we take 640 away from 800, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 12:
When dividing 1600 by 640, we get 2 with a remainder of 320.
Record the quotient 2 as the next digit in the result. 
Result so far: 2595.15312
The remainder is 320 after subtracting 1280 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 13:
640 goes into 3200 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 2595.153125
Subtracting 3200 from 3200 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.

Going ahead to step 14:
The number 640 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2595.153125
Subtract 0 from 0 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.

Going ahead to step 15:
640 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2595.153125
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.

In conclusion, the division gives 2595.153125 with a balance of 0.0.