Let's divide 51211990 by 442
We want to figure out the number of times 51211990 can be divided by 442.

Advancing to step 1:
The number 442 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 442

Let's proceed to step 2:
When dividing 51 by 442, we get 0 with 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.
Bring next digit (2) of the dividend behind the 51 and repeat the process: 512 / 442

Going ahead to step 3:
442 goes into 512 1 times with a remainder of 70.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 70 after subtracting 442 from 512.
Grab the next digit (1) from the dividend, add it to 70, then carry on: 701 / 442

Step 4:
The number 442 fits into 701 1 times, leaving a remainder of 259.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Deduct 442 from 701 and we're left with 259.
Grab the next digit (1) from the dividend, add it to 259, then carry on: 2591 / 442

Let's proceed to step 5:
442 can be fit into 2591 5 times, resulting in a remainder of 381.
Write down 5 as next digit of the result. 
Result so far: 115.0
Subtracting 2210 from 2591 leaves us with 381.
Grab the next digit (9) from the dividend, add it to 381, then carry on: 3819 / 442

Moving on to step 6:
442 goes into 3819 8 times with a remainder of 283.
Use 8 as the next digit of our solution. 
Result so far: 1158.0
The remainder is 283 after subtracting 3536 from 3819.
Append the next digit (9) from the dividend to 283 and continue with: 2839 / 442

Advancing to step 7:
442 goes into 2839 6 times with a remainder of 187.
Use 6 as the next digit of our solution. 
Result so far: 11586.0
If we take 2652 away from 2839, we end up with 187.
Include the next digit (0) from the dividend after 187, then repeat: 1870 / 442

Step 8:
442 can be fit into 1870 4 times, resulting in a remainder of 102.
Put 4 as the next digit of the answer. 
Result so far: 115864.0
Subtracting 1768 from 1870 leaves us with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 9:
442 can be fit into 1020 2 times, resulting in a remainder of 136.
Put 2 as the next digit of the answer. 
Result so far: 115864.2
If we take 884 away from 1020, we end up with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 10:
442 can be fit into 1360 3 times, resulting in a remainder of 34.
Put 3 as the next digit of the answer. 
Result so far: 115864.23
Deduct 1326 from 1360 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 11:
340 divided by 442 is 0 with a remainder of 340.
Record the quotient 0 as the next digit in the result. 
Result so far: 115864.23
Subtracting 0 from 340 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 12:
The number 442 fits into 3400 7 times, leaving a remainder of 306.
Put 7 as the next digit of the answer. 
Result so far: 115864.2307
Subtract 3094 from 3400 to get 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Advancing to step 13:
442 goes into 3060 6 times with a remainder of 408.
Write down 6 as next digit of the result. 
Result so far: 115864.23076
Deduct 2652 from 3060 and we're left with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Moving on to step 14:
442 goes into 4080 9 times with a remainder of 102.
Record the quotient 9 as the next digit in the result. 
Result so far: 115864.230769
Subtract 3978 from 4080 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Advancing to step 15:
442 can be fit into 1020 2 times, resulting in a remainder of 136.
The next digit of our result is 2. 
Result so far: 115864.2307692
Subtracting 884 from 1020 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 16:
The number 442 fits into 1360 3 times, leaving a remainder of 34.
Write down 3 as next digit of the result. 
Result so far: 115864.23076923
Subtracting 1326 from 1360 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

The final outcome is 115864.23076923, with a leftover of 3.4e-08.