We're dividing 51156364 by 642 
We're looking to find how many times 642 goes into 51156364.

Moving on to step 1:
642 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 642

Let's proceed to step 2:
If we divide 51 by 642, we get 0 and a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Grab the next digit (1) from the dividend, add it to 51, then carry on: 511 / 642

Let's proceed to step 3:
When dividing 511 by 642, we get 0 with a remainder of 511.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 511 to get 511.
Include the next digit (5) from the dividend after 511, then repeat: 5115 / 642

Advancing to step 4:
642 goes into 5115 7 times with a remainder of 621.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 4494 from 5115 to get 621.
Append the next digit (6) from the dividend to 621 and continue with: 6216 / 642

Going ahead to step 5:
If we divide 6216 by 642, we get 9 and a remainder of 438.
Use 9 as the next digit of our solution. 
Result so far: 79.0
Deduct 5778 from 6216 and we're left with 438.
Fetch the next digit (3) from the dividend, attach it to 438 and continue: 4383 / 642

Advancing to step 6:
642 goes into 4383 6 times with a remainder of 531.
Write down 6 as next digit of the result. 
Result so far: 796.0
Deduct 3852 from 4383 and we're left with 531.
Grab the next digit (6) from the dividend, add it to 531, then carry on: 5316 / 642

Advancing to step 7:
642 goes into 5316 8 times with a remainder of 180.
Record the quotient 8 as the next digit in the result. 
Result so far: 7968.0
Subtracting 5136 from 5316 leaves us with 180.
Bring next digit (4) of the dividend behind the 180 and repeat the process: 1804 / 642

Let's proceed to step 8:
642 goes into 1804 2 times with a remainder of 520.
Use 2 as the next digit of our solution. 
Result so far: 79682.0
If we take 1284 away from 1804, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Advancing to step 9:
642 can be fit into 5200 8 times, resulting in a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 79682.8
Subtracting 5136 from 5200 leaves us 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.

Moving on to step 10:
642 can be fit into 640 0 times, resulting in a remainder of 640.
The next digit of our result is 0. 
Result so far: 79682.8
Deduct 0 from 640 and we're left with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Moving on to step 11:
When dividing 6400 by 642, we get 9 with a remainder of 622.
Record the quotient 9 as the next digit in the result. 
Result so far: 79682.809
Deduct 5778 from 6400 and we're left with 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Let's proceed to step 12:
If we divide 6220 by 642, we get 9 and a remainder of 442.
Use 9 as the next digit of our solution. 
Result so far: 79682.8099
If we subtract 5778 from 6220, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

The quotient of the division is 79682.8099, and the remainder is 0.00442.