51451203 ÷ 673 
We want to divide 51451203 by 673.

Step 1:
673 can be fit into 5 0 times, resulting in 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.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 673

Going ahead to step 2:
When dividing 51 by 673, we get 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (4) from the dividend and append it to 51, then repeat: 514 / 673

Let's proceed to step 3:
If we divide 514 by 673, we get 0 and a remainder of 514.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 514, we get 514.
Grab the next digit (5) from the dividend, add it to 514, then carry on: 5145 / 673

Let's proceed to step 4:
If we divide 5145 by 673, we get 7 and a remainder of 434.
The next digit of our result is 7. 
Result so far: 7.0
Subtract 4711 from 5145 to get 434.
Append the next digit (1) from the dividend to 434 and continue with: 4341 / 673

Step 5:
4341 divided by 673 is 6 with a remainder of 303.
The next digit of our result is 6. 
Result so far: 76.0
Deduct 4038 from 4341 and we're left with 303.
Take the next digit (2) from the dividend and append it to 303, then repeat: 3032 / 673

Step 6:
When dividing 3032 by 673, we get 4 with a remainder of 340.
The number 4 becomes the next digit in our result. 
Result so far: 764.0
Subtracting 2692 from 3032 leaves us with 340.
Fetch the next digit (0) from the dividend, attach it to 340 and continue: 3400 / 673

Let's proceed to step 7:
When dividing 3400 by 673, we get 5 with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 7645.0
If we subtract 3365 from 3400, we get 35.
Include the next digit (3) from the dividend after 35, then repeat: 353 / 673

On to step 8:
If we divide 353 by 673, we get 0 and a remainder of 353.
Use 0 as the next digit of our solution. 
Result so far: 76450.0
If we take 0 away from 353, we end up with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Step 9:
3530 divided by 673 is 5 with a remainder of 165.
The number 5 becomes the next digit in our result. 
Result so far: 76450.5
Deduct 3365 from 3530 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Moving on to step 10:
673 goes into 1650 2 times with a remainder of 304.
Write down 2 as next digit of the result. 
Result so far: 76450.52
The remainder is 304 after subtracting 1346 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Advancing to step 11:
When dividing 3040 by 673, we get 4 with a remainder of 348.
The number 4 becomes the next digit in our result. 
Result so far: 76450.524
If we take 2692 away from 3040, we end up with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Step 12:
3480 divided by 673 is 5 with a remainder of 115.
The number 5 becomes the next digit in our result. 
Result so far: 76450.5245
If we take 3365 away from 3480, we end up with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Step 13:
If we divide 1150 by 673, we get 1 and a remainder of 477.
Record the quotient 1 as the next digit in the result. 
Result so far: 76450.52451
Deduct 673 from 1150 and we're left with 477.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Let's proceed to step 14:
673 goes into 4770 7 times with a remainder of 59.
Use 7 as the next digit of our solution. 
Result so far: 76450.524517
Subtracting 4711 from 4770 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 15:
The number 673 fits into 590 0 times, leaving a remainder of 590.
Record the quotient 0 as the next digit in the result. 
Result so far: 76450.524517
The remainder is 590 after subtracting 0 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Advancing to step 16:
If we divide 5900 by 673, we get 8 and a remainder of 516.
The next digit of our result is 8. 
Result so far: 76450.52451708
Subtract 5384 from 5900 to get 516.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5160, and continue the process.

The final outcome is 76450.52451708, with a leftover of 5.16e-07.