51839870 ÷ 68 
We want to figure out the number of times 51839870 can be divided by 68.

Moving on to step 1:
5 divided by 68 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 68

Going ahead to step 2:
68 goes into 51 0 times with a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Grab the next digit (8) from the dividend, add it to 51, then carry on: 518 / 68

On to step 3:
68 goes into 518 7 times with a remainder of 42.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 476 from 518 to get 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 68

Going ahead to step 4:
The number 68 fits into 423 6 times, leaving a remainder of 15.
The next digit of our result is 6. 
Result so far: 76.0
Deduct 408 from 423 and we're left with 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 68

On to step 5:
When dividing 159 by 68, we get 2 with a remainder of 23.
The next digit of our result is 2. 
Result so far: 762.0
If we subtract 136 from 159, we get 23.
Fetch the next digit (8) from the dividend, attach it to 23 and continue: 238 / 68

Moving on to step 6:
238 divided by 68 is 3 with a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 7623.0
The remainder is 34 after subtracting 204 from 238.
Take the next digit (7) from the dividend and append it to 34, then repeat: 347 / 68

On to step 7:
347 divided by 68 is 5 with a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 76235.0
If we subtract 340 from 347, we get 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 68

Advancing to step 8:
When dividing 70 by 68, we get 1 with a remainder of 2.
Put 1 as the next digit of the answer. 
Result so far: 762351.0
If we take 68 away from 70, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 9:
68 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 762351.0
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
When dividing 200 by 68, we get 2 with a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 762351.02
If we subtract 136 from 200, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 11:
If we divide 640 by 68, we get 9 and a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 762351.029
If we subtract 612 from 640, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 12:
280 divided by 68 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 762351.0294
If we subtract 272 from 280, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
68 can be fit into 80 1 times, resulting in a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 762351.02941
Deduct 68 from 80 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 14:
If we divide 120 by 68, we get 1 and a remainder of 52.
The next digit of our result is 1. 
Result so far: 762351.029411
Subtract 68 from 120 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 762351.029411 and a remainder of 5.2e-06.