401720 ÷ 99 
We want to divide 401720 by 99.

Step 1:
The number 99 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 99

On to step 2:
40 divided by 99 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Grab the next digit (1) from the dividend, add it to 40, then carry on: 401 / 99

Advancing to step 3:
The number 99 fits into 401 4 times, leaving a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 396 from 401 leaves us with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 99

On to step 4:
The number 99 fits into 57 0 times, leaving a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Deduct 0 from 57 and we're left with 57.
Grab the next digit (2) from the dividend, add it to 57, then carry on: 572 / 99

Step 5:
99 can be fit into 572 5 times, resulting in a remainder of 77.
Put 5 as the next digit of the answer. 
Result so far: 405.0
Subtract 495 from 572 to get 77.
Fetch the next digit (0) from the dividend, attach it to 77 and continue: 770 / 99

Step 6:
99 can be fit into 770 7 times, resulting in a remainder of 77.
Record the quotient 7 as the next digit in the result. 
Result so far: 4057.0
Deduct 693 from 770 and we're left with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 7:
If we divide 770 by 99, we get 7 and a remainder of 77.
Record the quotient 7 as the next digit in the result. 
Result so far: 4057.7
The remainder is 77 after subtracting 693 from 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 8:
If we divide 770 by 99, we get 7 and a remainder of 77.
Put 7 as the next digit of the answer. 
Result so far: 4057.77
Subtracting 693 from 770 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

The final outcome is 4057.77, with a leftover of 0.077.