Let's divide 151261 by 1
Let's see how many times 1 fits into 151261.

On to step 1:
1 divided by 1 is 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 1 from 1, we get 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 1

Moving on to step 2:
1 goes into 5 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 0 after subtracting 5 from 5.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 1

Going ahead to step 3:
1 divided by 1 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 151.0
If we subtract 1 from 1, we get 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 1

On to step 4:
The number 1 fits into 2 2 times, leaving a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 1512.0
If we take 2 away from 2, we end up with 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 1

Going ahead to step 5:
1 can be fit into 6 6 times, resulting in a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 15126.0
If we take 6 away from 6, we end up with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 1

Advancing to step 6:
The number 1 fits into 1 1 times, leaving a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 151261.0
Deduct 1 from 1 and we're left 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.

On to step 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 151261.0
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.

Moving on to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 151261.0
Deduct 0 from 0 and we're left 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.

The final outcome is 151261.0, with a leftover of 0.0.