We're dividing 621416 by 3 
We want to figure out the number of times 621416 can be divided by 3.

Moving on to step 1:
3 goes into 6 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 6 from 6 leaves us with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 3

Step 2:
3 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 3

Step 3:
21 divided by 3 is 7 with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 207.0
If we take 21 away from 21, we end up with 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 3

On to step 4:
3 can be fit into 4 1 times, resulting in a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 2071.0
If we take 3 away from 4, we end up with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 3

Advancing to step 5:
The number 3 fits into 11 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 20713.0
Subtract 9 from 11 to get 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 3

Advancing to step 6:
If we divide 26 by 3, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 207138.0
If we subtract 24 from 26, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 207138.6
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
3 can be fit into 20 6 times, resulting in a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 207138.66
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 207138.66 with a remaining 0.002.