401213 ÷ 1 
Let's see how many times 1 fits into 401213.

Let's proceed to step 1:
When dividing 4 by 1, we get 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 4 from 4 to get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 1

Advancing to step 2:
1 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtracting 0 from 0 leaves us with 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 1

On to step 3:
1 divided by 1 is 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 401.0
Deduct 1 from 1 and we're left with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

Advancing to step 4:
The number 1 fits into 2 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 4012.0
If we take 2 away from 2, we end up with 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 1

On to step 5:
The number 1 fits into 1 1 times, leaving a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 40121.0
Deduct 1 from 1 and we're left with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 1

Advancing to step 6:
The number 1 fits into 3 3 times, leaving a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 401213.0
If we take 3 away from 3, we end up 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.

Advancing to step 7:
1 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: 401213.0
If we take 0 away from 0, we end up 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.

Let's proceed to step 8:
1 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 401213.0
If we take 0 away from 0, we end up 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 result is 401213.0 with a remainder of 0.0.