We divide 42121860 by 509
We're looking to find how many times 509 goes into 42121860.

Advancing to step 1:
If we divide 4 by 509, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 509

Moving on to step 2:
The number 509 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 509

On to step 3:
421 divided by 509 is 0 with a remainder of 421.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 421 leaves us with 421.
Grab the next digit (2) from the dividend, add it to 421, then carry on: 4212 / 509

Let's proceed to step 4:
509 goes into 4212 8 times with a remainder of 140.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtract 4072 from 4212 to get 140.
Take the next digit (1) from the dividend and append it to 140, then repeat: 1401 / 509

Step 5:
If we divide 1401 by 509, we get 2 and a remainder of 383.
Use 2 as the next digit of our solution. 
Result so far: 82.0
The remainder is 383 after subtracting 1018 from 1401.
Take the next digit (8) from the dividend and append it to 383, then repeat: 3838 / 509

On to step 6:
The number 509 fits into 3838 7 times, leaving a remainder of 275.
Use 7 as the next digit of our solution. 
Result so far: 827.0
If we subtract 3563 from 3838, we get 275.
Grab the next digit (6) from the dividend, add it to 275, then carry on: 2756 / 509

Moving on to step 7:
509 goes into 2756 5 times with a remainder of 211.
Use 5 as the next digit of our solution. 
Result so far: 8275.0
Deduct 2545 from 2756 and we're left with 211.
Bring next digit (0) of the dividend behind the 211 and repeat the process: 2110 / 509

Going ahead to step 8:
The number 509 fits into 2110 4 times, leaving a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 82754.0
Deduct 2036 from 2110 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 9:
When dividing 740 by 509, we get 1 with a remainder of 231.
Record the quotient 1 as the next digit in the result. 
Result so far: 82754.1
If we take 509 away from 740, 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.

Moving on to step 10:
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: 82754.14
Deduct 2036 from 2310 and we're left with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Step 11:
The number 509 fits into 2740 5 times, leaving a remainder of 195.
Write down 5 as next digit of the result. 
Result so far: 82754.145
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.

Moving on to step 12:
When dividing 1950 by 509, we get 3 with a remainder of 423.
The number 3 becomes the next digit in our result. 
Result so far: 82754.1453
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.

Moving on to step 13:
509 goes into 4230 8 times with a remainder of 158.
Write down 8 as next digit of the result. 
Result so far: 82754.14538
If we subtract 4072 from 4230, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Let's proceed to step 14:
1580 divided by 509 is 3 with a remainder of 53.
Record the quotient 3 as the next digit in the result. 
Result so far: 82754.145383
Subtract 1527 from 1580 to get 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 15:
If we divide 530 by 509, we get 1 and a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 82754.1453831
The remainder is 21 after subtracting 509 from 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 16:
If we divide 210 by 509, we get 0 and a remainder of 210.
Put 0 as the next digit of the answer. 
Result so far: 82754.1453831
Deduct 0 from 210 and we're left 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.

After the division, we end up with 82754.1453831 and a remainder of 2.1e-07.