We're dividing 370419 by 21 
Let's see how many times 21 fits into 370419.

Let's proceed to step 1:
3 divided by 21 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 21

On to step 2:
When dividing 37 by 21, we get 1 with a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 21 from 37 leaves us with 16.
Take the next digit (0) from the dividend and append it to 16, then repeat: 160 / 21

Advancing to step 3:
If we divide 160 by 21, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
If we subtract 147 from 160, we get 13.
Append the next digit (4) from the dividend to 13 and continue with: 134 / 21

Moving on to step 4:
21 goes into 134 6 times with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 176.0
If we subtract 126 from 134, we get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 21

Let's proceed to step 5:
When dividing 81 by 21, we get 3 with a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 1763.0
If we take 63 away from 81, we end up with 18.
Fetch the next digit (9) from the dividend, attach it to 18 and continue: 189 / 21

Let's proceed to step 6:
The number 21 fits into 189 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 17639.0
Subtract 189 from 189 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.

Going ahead to step 7:
The number 21 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 17639.0
The remainder is 0 after subtracting 0 from 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:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17639.0
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.

After the division, we end up with 17639.0 and a remainder of 0.0.