53939213 ÷ 345 
We're looking to find how many times 345 goes into 53939213.

Step 1:
When dividing 5 by 345, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 345

Going ahead to step 2:
53 divided by 345 is 0 with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Fetch the next digit (9) from the dividend, attach it to 53 and continue: 539 / 345

Step 3:
345 goes into 539 1 times with a remainder of 194.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 194 after subtracting 345 from 539.
Fetch the next digit (3) from the dividend, attach it to 194 and continue: 1943 / 345

Advancing to step 4:
345 can be fit into 1943 5 times, resulting in a remainder of 218.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we take 1725 away from 1943, we end up with 218.
Grab the next digit (9) from the dividend, add it to 218, then carry on: 2189 / 345

Step 5:
2189 divided by 345 is 6 with a remainder of 119.
The next digit of our result is 6. 
Result so far: 156.0
Deduct 2070 from 2189 and we're left with 119.
Bring next digit (2) of the dividend behind the 119 and repeat the process: 1192 / 345

Moving on to step 6:
The number 345 fits into 1192 3 times, leaving a remainder of 157.
Record the quotient 3 as the next digit in the result. 
Result so far: 1563.0
If we take 1035 away from 1192, we end up with 157.
Bring next digit (1) of the dividend behind the 157 and repeat the process: 1571 / 345

Going ahead to step 7:
1571 divided by 345 is 4 with a remainder of 191.
Record the quotient 4 as the next digit in the result. 
Result so far: 15634.0
If we subtract 1380 from 1571, we get 191.
Bring next digit (3) of the dividend behind the 191 and repeat the process: 1913 / 345

Moving on to step 8:
1913 divided by 345 is 5 with a remainder of 188.
Record the quotient 5 as the next digit in the result. 
Result so far: 156345.0
Deduct 1725 from 1913 and we're left with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 9:
345 can be fit into 1880 5 times, resulting in a remainder of 155.
Record the quotient 5 as the next digit in the result. 
Result so far: 156345.5
Subtracting 1725 from 1880 leaves us with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 10:
1550 divided by 345 is 4 with a remainder of 170.
The number 4 becomes the next digit in our result. 
Result so far: 156345.54
If we take 1380 away from 1550, we end up with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 11:
If we divide 1700 by 345, we get 4 and a remainder of 320.
Use 4 as the next digit of our solution. 
Result so far: 156345.544
If we subtract 1380 from 1700, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

The quotient of the division is 156345.544, and the remainder is 0.032.