We look at the division of 377605 by 21 
Our goal is to divide 377605 by 21.

Moving on to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (7) from the dividend, attach it to 3 and continue: 37 / 21

Going ahead to step 2:
The number 21 fits into 37 1 times, leaving a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 21 away from 37, we end up with 16.
Bring next digit (7) of the dividend behind the 16 and repeat the process: 167 / 21

On to step 3:
21 goes into 167 7 times with a remainder of 20.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Subtracting 147 from 167 leaves us with 20.
Grab the next digit (6) from the dividend, add it to 20, then carry on: 206 / 21

Step 4:
The number 21 fits into 206 9 times, leaving a remainder of 17.
The number 9 becomes the next digit in our result. 
Result so far: 179.0
Subtract 189 from 206 to get 17.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 21

Moving on to step 5:
170 divided by 21 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 1798.0
If we take 168 away from 170, we end up with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 21

Going ahead to step 6:
When dividing 25 by 21, we get 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 17981.0
If we take 21 away from 25, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 7:
21 goes into 40 1 times with a remainder of 19.
The next digit of our result is 1. 
Result so far: 17981.1
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 17981.19
If we subtract 189 from 190, we get 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 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 17981.19
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
100 divided by 21 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 17981.1904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 11:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 17981.19047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 12:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 17981.190476
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 13:
40 divided by 21 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 17981.1904761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 14:
21 can be fit into 190 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 17981.19047619
Deduct 189 from 190 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.

Our division results in 17981.19047619 with a remaining 1e-09.