375721 divided by 3 
Let's see how many times 3 fits into 375721.

Let's proceed to step 1:
When dividing 3 by 3, we get 1 with a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 3 from 3, we get 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 3

On to step 2:
When dividing 7 by 3, we get 2 with a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtract 6 from 7 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 3

On to step 3:
When dividing 15 by 3, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 125.0
If we subtract 15 from 15, we get 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 3

On to step 4:
3 can be fit into 7 2 times, resulting in a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 1252.0
If we take 6 away from 7, we end up with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 3

Going ahead to step 5:
The number 3 fits into 12 4 times, leaving a remainder of 0.
The next digit of our result is 4. 
Result so far: 12524.0
Subtract 12 from 12 to get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 3

Step 6:
3 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 125240.0
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.

Step 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 125240.3
Subtracting 9 from 10 leaves us 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.

Going ahead to step 8:
3 goes into 10 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 125240.33
If we take 9 away from 10, we end up 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.

After the division, we end up with 125240.33 and a remainder of 0.001.