We're dividing 21334788 by 402 
Let's see how many times 402 fits into 21334788.

Step 1:
The number 402 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 402

Going ahead to step 2:
When dividing 21 by 402, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 402

Moving on to step 3:
If we divide 213 by 402, we get 0 and a remainder of 213.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 213 and we're left with 213.
Include the next digit (3) from the dividend after 213, then repeat: 2133 / 402

On to step 4:
402 goes into 2133 5 times with a remainder of 123.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 2010 from 2133 and we're left with 123.
Append the next digit (4) from the dividend to 123 and continue with: 1234 / 402

Step 5:
1234 divided by 402 is 3 with a remainder of 28.
Use 3 as the next digit of our solution. 
Result so far: 53.0
Deduct 1206 from 1234 and we're left with 28.
Bring next digit (7) of the dividend behind the 28 and repeat the process: 287 / 402

On to step 6:
402 can be fit into 287 0 times, resulting in a remainder of 287.
The next digit of our result is 0. 
Result so far: 530.0
If we subtract 0 from 287, we get 287.
Fetch the next digit (8) from the dividend, attach it to 287 and continue: 2878 / 402

Moving on to step 7:
The number 402 fits into 2878 7 times, leaving a remainder of 64.
Write down 7 as next digit of the result. 
Result so far: 5307.0
Deduct 2814 from 2878 and we're left with 64.
Take the next digit (8) from the dividend and append it to 64, then repeat: 648 / 402

On to step 8:
If we divide 648 by 402, we get 1 and a remainder of 246.
Write down 1 as next digit of the result. 
Result so far: 53071.0
Subtracting 402 from 648 leaves us with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Going ahead to step 9:
402 goes into 2460 6 times with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 53071.6
Deduct 2412 from 2460 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 10:
480 divided by 402 is 1 with a remainder of 78.
Use 1 as the next digit of our solution. 
Result so far: 53071.61
If we subtract 402 from 480, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 11:
780 divided by 402 is 1 with a remainder of 378.
Use 1 as the next digit of our solution. 
Result so far: 53071.611
If we subtract 402 from 780, we get 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

The final outcome is 53071.611, with a leftover of 0.0378.