We're dividing 51390889 by 89 
We want to divide 51390889 by 89.

Let's proceed to step 1:
If we divide 5 by 89, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 89

Let's proceed to step 2:
If we divide 51 by 89, we get 0 and a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Append the next digit (3) from the dividend to 51 and continue with: 513 / 89

Step 3:
The number 89 fits into 513 5 times, leaving a remainder of 68.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 445 away from 513, we end up with 68.
Include the next digit (9) from the dividend after 68, then repeat: 689 / 89

Going ahead to step 4:
89 goes into 689 7 times with a remainder of 66.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
Subtracting 623 from 689 leaves us with 66.
Include the next digit (0) from the dividend after 66, then repeat: 660 / 89

Moving on to step 5:
If we divide 660 by 89, we get 7 and a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 577.0
Deduct 623 from 660 and we're left with 37.
Append the next digit (8) from the dividend to 37 and continue with: 378 / 89

Advancing to step 6:
89 goes into 378 4 times with a remainder of 22.
Use 4 as the next digit of our solution. 
Result so far: 5774.0
Subtract 356 from 378 to get 22.
Fetch the next digit (8) from the dividend, attach it to 22 and continue: 228 / 89

Moving on to step 7:
89 can be fit into 228 2 times, resulting in a remainder of 50.
Put 2 as the next digit of the answer. 
Result so far: 57742.0
Subtracting 178 from 228 leaves us with 50.
Grab the next digit (9) from the dividend, add it to 50, then carry on: 509 / 89

On to step 8:
When dividing 509 by 89, we get 5 with a remainder of 64.
The next digit of our result is 5. 
Result so far: 577425.0
If we subtract 445 from 509, 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 9:
640 divided by 89 is 7 with a remainder of 17.
The next digit of our result is 7. 
Result so far: 577425.7
Subtract 623 from 640 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 10:
170 divided by 89 is 1 with a remainder of 81.
The next digit of our result is 1. 
Result so far: 577425.71
Subtract 89 from 170 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 11:
If we divide 810 by 89, we get 9 and a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 577425.719
The remainder is 9 after subtracting 801 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 12:
When dividing 90 by 89, we get 1 with a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 577425.7191
Subtract 89 from 90 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
10 divided by 89 is 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 577425.7191
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 14:
The number 89 fits into 100 1 times, leaving a remainder of 11.
The next digit of our result is 1. 
Result so far: 577425.719101
Deduct 89 from 100 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 15:
When dividing 110 by 89, we get 1 with a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 577425.7191011
The remainder is 21 after subtracting 89 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

After the division, we end up with 577425.7191011 and a remainder of 2.1e-07.