21688773 divided by 406 
Let's see how many times 406 fits into 21688773.

Advancing to step 1:
406 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 406

Step 2:
If we divide 21 by 406, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (6) from the dividend and append it to 21, then repeat: 216 / 406

On to step 3:
The number 406 fits into 216 0 times, leaving a remainder of 216.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 216 to get 216.
Include the next digit (8) from the dividend after 216, then repeat: 2168 / 406

On to step 4:
The number 406 fits into 2168 5 times, leaving a remainder of 138.
The next digit of our result is 5. 
Result so far: 5.0
The remainder is 138 after subtracting 2030 from 2168.
Include the next digit (8) from the dividend after 138, then repeat: 1388 / 406

Let's proceed to step 5:
406 goes into 1388 3 times with a remainder of 170.
Write down 3 as next digit of the result. 
Result so far: 53.0
If we take 1218 away from 1388, we end up with 170.
Fetch the next digit (7) from the dividend, attach it to 170 and continue: 1707 / 406

Moving on to step 6:
1707 divided by 406 is 4 with a remainder of 83.
Write down 4 as next digit of the result. 
Result so far: 534.0
If we take 1624 away from 1707, we end up with 83.
Take the next digit (7) from the dividend and append it to 83, then repeat: 837 / 406

Going ahead to step 7:
The number 406 fits into 837 2 times, leaving a remainder of 25.
Write down 2 as next digit of the result. 
Result so far: 5342.0
If we subtract 812 from 837, we get 25.
Take the next digit (3) from the dividend and append it to 25, then repeat: 253 / 406

Going ahead to step 8:
253 divided by 406 is 0 with a remainder of 253.
Record the quotient 0 as the next digit in the result. 
Result so far: 53420.0
Deduct 0 from 253 and we're left with 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

On to step 9:
406 goes into 2530 6 times with a remainder of 94.
The next digit of our result is 6. 
Result so far: 53420.6
Deduct 2436 from 2530 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Moving on to step 10:
When dividing 940 by 406, we get 2 with a remainder of 128.
The number 2 becomes the next digit in our result. 
Result so far: 53420.62
The remainder is 128 after subtracting 812 from 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Let's proceed to step 11:
The number 406 fits into 1280 3 times, leaving a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 53420.623
If we subtract 1218 from 1280, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 12:
620 divided by 406 is 1 with a remainder of 214.
Write down 1 as next digit of the result. 
Result so far: 53420.6231
Deduct 406 from 620 and we're left with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Advancing to step 13:
If we divide 2140 by 406, we get 5 and a remainder of 110.
Write down 5 as next digit of the result. 
Result so far: 53420.62315
If we take 2030 away from 2140, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Step 14:
When dividing 1100 by 406, we get 2 with a remainder of 288.
Write down 2 as next digit of the result. 
Result so far: 53420.623152
If we subtract 812 from 1100, we get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Let's proceed to step 15:
If we divide 2880 by 406, we get 7 and a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 53420.6231527
Deduct 2842 from 2880 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 16:
380 divided by 406 is 0 with a remainder of 380.
The number 0 becomes the next digit in our result. 
Result so far: 53420.6231527
Deduct 0 from 380 and we're left with 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Our division results in 53420.6231527 with a remaining 3.8e-07.