We look at the division of 51135571 by 386 
We want to figure out the number of times 51135571 can be divided by 386.

Step 1:
If we divide 5 by 386, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 386

Moving on to step 2:
51 divided by 386 is 0 with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (1) from the dividend after 51, then repeat: 511 / 386

Advancing to step 3:
If we divide 511 by 386, we get 1 and a remainder of 125.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 386 from 511 leaves us with 125.
Bring next digit (3) of the dividend behind the 125 and repeat the process: 1253 / 386

Moving on to step 4:
386 can be fit into 1253 3 times, resulting in a remainder of 95.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 1158 from 1253, we get 95.
Take the next digit (5) from the dividend and append it to 95, then repeat: 955 / 386

Let's proceed to step 5:
386 can be fit into 955 2 times, resulting in a remainder of 183.
Record the quotient 2 as the next digit in the result. 
Result so far: 132.0
The remainder is 183 after subtracting 772 from 955.
Bring next digit (5) of the dividend behind the 183 and repeat the process: 1835 / 386

Step 6:
386 goes into 1835 4 times with a remainder of 291.
The number 4 becomes the next digit in our result. 
Result so far: 1324.0
Subtract 1544 from 1835 to get 291.
Grab the next digit (7) from the dividend, add it to 291, then carry on: 2917 / 386

Advancing to step 7:
386 goes into 2917 7 times with a remainder of 215.
Put 7 as the next digit of the answer. 
Result so far: 13247.0
Deduct 2702 from 2917 and we're left with 215.
Take the next digit (1) from the dividend and append it to 215, then repeat: 2151 / 386

Step 8:
2151 divided by 386 is 5 with a remainder of 221.
Use 5 as the next digit of our solution. 
Result so far: 132475.0
Subtracting 1930 from 2151 leaves us with 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Going ahead to step 9:
2210 divided by 386 is 5 with a remainder of 280.
Write down 5 as next digit of the result. 
Result so far: 132475.5
Deduct 1930 from 2210 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 10:
386 can be fit into 2800 7 times, resulting in a remainder of 98.
Record the quotient 7 as the next digit in the result. 
Result so far: 132475.57
Subtract 2702 from 2800 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Going ahead to step 11:
386 can be fit into 980 2 times, resulting in a remainder of 208.
Use 2 as the next digit of our solution. 
Result so far: 132475.572
If we take 772 away from 980, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Moving on to step 12:
The number 386 fits into 2080 5 times, leaving a remainder of 150.
The next digit of our result is 5. 
Result so far: 132475.5725
Deduct 1930 from 2080 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 13:
When dividing 1500 by 386, we get 3 with a remainder of 342.
Put 3 as the next digit of the answer. 
Result so far: 132475.57253
If we subtract 1158 from 1500, we get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Let's proceed to step 14:
386 goes into 3420 8 times with a remainder of 332.
Write down 8 as next digit of the result. 
Result so far: 132475.572538
Deduct 3088 from 3420 and we're left with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Step 15:
386 can be fit into 3320 8 times, resulting in a remainder of 232.
Use 8 as the next digit of our solution. 
Result so far: 132475.5725388
Deduct 3088 from 3320 and we're left with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

After the division, we end up with 132475.5725388 and a remainder of 2.32e-06.