Let's divide 70621436 by 509
We're looking to find how many times 509 goes into 70621436.

Step 1:
When dividing 7 by 509, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 509

Step 2:
509 can be fit into 70 0 times, resulting in a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 70, we end up with 70.
Fetch the next digit (6) from the dividend, attach it to 70 and continue: 706 / 509

On to step 3:
When dividing 706 by 509, we get 1 with a remainder of 197.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 509 from 706 to get 197.
Include the next digit (2) from the dividend after 197, then repeat: 1972 / 509

Advancing to step 4:
If we divide 1972 by 509, we get 3 and a remainder of 445.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 445 after subtracting 1527 from 1972.
Bring next digit (1) of the dividend behind the 445 and repeat the process: 4451 / 509

Going ahead to step 5:
4451 divided by 509 is 8 with a remainder of 379.
Record the quotient 8 as the next digit in the result. 
Result so far: 138.0
Deduct 4072 from 4451 and we're left with 379.
Include the next digit (4) from the dividend after 379, then repeat: 3794 / 509

On to step 6:
509 goes into 3794 7 times with a remainder of 231.
Use 7 as the next digit of our solution. 
Result so far: 1387.0
Subtract 3563 from 3794 to get 231.
Take the next digit (3) from the dividend and append it to 231, then repeat: 2313 / 509

Moving on to step 7:
The number 509 fits into 2313 4 times, leaving a remainder of 277.
Use 4 as the next digit of our solution. 
Result so far: 13874.0
Subtract 2036 from 2313 to get 277.
Bring next digit (6) of the dividend behind the 277 and repeat the process: 2776 / 509

On to step 8:
2776 divided by 509 is 5 with a remainder of 231.
Use 5 as the next digit of our solution. 
Result so far: 138745.0
If we take 2545 away from 2776, we end up with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Let's proceed to step 9:
When dividing 2310 by 509, we get 4 with a remainder of 274.
Put 4 as the next digit of the answer. 
Result so far: 138745.4
Subtract 2036 from 2310 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Advancing to step 10:
509 goes into 2740 5 times with a remainder of 195.
Write down 5 as next digit of the result. 
Result so far: 138745.45
Subtract 2545 from 2740 to get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Step 11:
1950 divided by 509 is 3 with a remainder of 423.
The next digit of our result is 3. 
Result so far: 138745.453
Subtracting 1527 from 1950 leaves us with 423.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4230, and continue the process.

Advancing to step 12:
If we divide 4230 by 509, we get 8 and a remainder of 158.
Record the quotient 8 as the next digit in the result. 
Result so far: 138745.4538
If we take 4072 away from 4230, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Moving on to step 13:
509 can be fit into 1580 3 times, resulting in a remainder of 53.
The next digit of our result is 3. 
Result so far: 138745.45383
Deduct 1527 from 1580 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 14:
If we divide 530 by 509, we get 1 and a remainder of 21.
The next digit of our result is 1. 
Result so far: 138745.453831
Deduct 509 from 530 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 15:
509 goes into 210 0 times with a remainder of 210.
Record the quotient 0 as the next digit in the result. 
Result so far: 138745.453831
Subtracting 0 from 210 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 16:
When dividing 2100 by 509, we get 4 with a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 138745.45383104
Deduct 2036 from 2100 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The quotient of the division is 138745.45383104, and the remainder is 6.4e-08.