We divide 21513452 by 620
We want to figure out the number of times 21513452 can be divided by 620.

Advancing to step 1:
When dividing 2 by 620, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 620

Let's proceed to step 2:
When dividing 21 by 620, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 620

Going ahead to step 3:
If we divide 215 by 620, we get 0 and a remainder of 215.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 215 and we're left with 215.
Fetch the next digit (1) from the dividend, attach it to 215 and continue: 2151 / 620

Let's proceed to step 4:
When dividing 2151 by 620, we get 3 with a remainder of 291.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 1860 from 2151 to get 291.
Bring next digit (3) of the dividend behind the 291 and repeat the process: 2913 / 620

Going ahead to step 5:
If we divide 2913 by 620, we get 4 and a remainder of 433.
The number 4 becomes the next digit in our result. 
Result so far: 34.0
If we take 2480 away from 2913, we end up with 433.
Grab the next digit (4) from the dividend, add it to 433, then carry on: 4334 / 620

On to step 6:
If we divide 4334 by 620, we get 6 and a remainder of 614.
Put 6 as the next digit of the answer. 
Result so far: 346.0
Subtract 3720 from 4334 to get 614.
Fetch the next digit (5) from the dividend, attach it to 614 and continue: 6145 / 620

Going ahead to step 7:
620 goes into 6145 9 times with a remainder of 565.
Put 9 as the next digit of the answer. 
Result so far: 3469.0
The remainder is 565 after subtracting 5580 from 6145.
Append the next digit (2) from the dividend to 565 and continue with: 5652 / 620

On to step 8:
620 goes into 5652 9 times with a remainder of 72.
Put 9 as the next digit of the answer. 
Result so far: 34699.0
Subtracting 5580 from 5652 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 9:
620 goes into 720 1 times with a remainder of 100.
The next digit of our result is 1. 
Result so far: 34699.1
The remainder is 100 after subtracting 620 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 10:
1000 divided by 620 is 1 with a remainder of 380.
The number 1 becomes the next digit in our result. 
Result so far: 34699.11
If we take 620 away from 1000, we end up 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.

The final result is 34699.11 with a remainder of 0.38.