743400 ÷ 51 
We're looking to find how many times 51 goes into 743400.

Going ahead to step 1:
7 divided by 51 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 51

Let's proceed to step 2:
51 can be fit into 74 1 times, resulting in a remainder of 23.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 51 from 74, we get 23.
Grab the next digit (3) from the dividend, add it to 23, then carry on: 233 / 51

Step 3:
When dividing 233 by 51, we get 4 with a remainder of 29.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we subtract 204 from 233, we get 29.
Append the next digit (4) from the dividend to 29 and continue with: 294 / 51

Going ahead to step 4:
If we divide 294 by 51, we get 5 and a remainder of 39.
The number 5 becomes the next digit in our result. 
Result so far: 145.0
Subtract 255 from 294 to get 39.
Take the next digit (0) from the dividend and append it to 39, then repeat: 390 / 51

Going ahead to step 5:
The number 51 fits into 390 7 times, leaving a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 1457.0
Deduct 357 from 390 and we're left with 33.
Bring next digit (0) of the dividend behind the 33 and repeat the process: 330 / 51

Going ahead to step 6:
If we divide 330 by 51, we get 6 and a remainder of 24.
The next digit of our result is 6. 
Result so far: 14576.0
If we subtract 306 from 330, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
When dividing 240 by 51, we get 4 with a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 14576.4
If we subtract 204 from 240, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 8:
51 can be fit into 360 7 times, resulting in a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 14576.47
The remainder is 3 after subtracting 357 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
30 divided by 51 is 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 14576.47
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
When dividing 300 by 51, we get 5 with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 14576.4705
The remainder is 45 after subtracting 255 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 11:
When dividing 450 by 51, we get 8 with a remainder of 42.
Record the quotient 8 as the next digit in the result. 
Result so far: 14576.47058
The remainder is 42 after subtracting 408 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Let's proceed to step 12:
When dividing 420 by 51, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 14576.470588
Subtract 408 from 420 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 14576.470588, and the remainder is 1.2e-06.