We're dividing 21431 by 67 
We want to figure out the number of times 21431 can be divided by 67.

Step 1:
If we divide 2 by 67, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 67

Moving on to step 2:
When dividing 21 by 67, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 67

Going ahead to step 3:
214 divided by 67 is 3 with a remainder of 13.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 201 away from 214, we end up with 13.
Take the next digit (3) from the dividend and append it to 13, then repeat: 133 / 67

Advancing to step 4:
When dividing 133 by 67, we get 1 with a remainder of 66.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Deduct 67 from 133 and we're left with 66.
Grab the next digit (1) from the dividend, add it to 66, then carry on: 661 / 67

Moving on to step 5:
67 can be fit into 661 9 times, resulting in a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 319.0
Subtracting 603 from 661 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Let's proceed to step 6:
If we divide 580 by 67, we get 8 and a remainder of 44.
The next digit of our result is 8. 
Result so far: 319.8
Deduct 536 from 580 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 7:
67 goes into 440 6 times with a remainder of 38.
The number 6 becomes the next digit in our result. 
Result so far: 319.86
The remainder is 38 after subtracting 402 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 8:
380 divided by 67 is 5 with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 319.865
Deduct 335 from 380 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 9:
67 goes into 450 6 times with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 319.8656
The remainder is 48 after subtracting 402 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 10:
67 goes into 480 7 times with a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 319.86567
If we subtract 469 from 480, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 11:
If we divide 110 by 67, we get 1 and a remainder of 43.
Write down 1 as next digit of the result. 
Result so far: 319.865671
Deduct 67 from 110 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 12:
When dividing 430 by 67, we get 6 with a remainder of 28.
Put 6 as the next digit of the answer. 
Result so far: 319.8656716
Deduct 402 from 430 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 13:
280 divided by 67 is 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 319.86567164
Subtract 268 from 280 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 319.86567164, with a leftover of 1.2e-08.