777901 ÷ 15 
We want to figure out the number of times 777901 can be divided by 15.

Advancing to step 1:
When dividing 7 by 15, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 15

On to step 2:
If we divide 77 by 15, we get 5 and a remainder of 2.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 75 from 77 to get 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 15

Moving on to step 3:
15 can be fit into 27 1 times, resulting in a remainder of 12.
The next digit of our result is 1. 
Result so far: 51.0
If we subtract 15 from 27, we get 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 15

Moving on to step 4:
15 can be fit into 129 8 times, resulting in a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 518.0
Subtracting 120 from 129 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 15

Advancing to step 5:
If we divide 90 by 15, we get 6 and a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 5186.0
Deduct 90 from 90 and we're left with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 15

Advancing to step 6:
The number 15 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 51860.0
Deduct 0 from 1 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 15 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 51860.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
15 goes into 100 6 times with a remainder of 10.
The next digit of our result is 6. 
Result so far: 51860.06
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
100 divided by 15 is 6 with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 51860.066
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 51860.066 with a balance of 0.001.