Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (2) in the ones column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (12).
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
Subtract the numbers in the ones column from the top number:
12-5=7
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 7 |
Because the upper digit (0) in the tens column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (10).
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 7 |
Subtract the numbers in the tens column from the top number:
10-2=8
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 8 | 7 |
Subtract the numbers in the hundreds column from the top number:
6-4=2
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 2 | 8 | 7 |
Subtract the numbers in the thousands column from the top number:
4-2=2
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 2 | 2 | 8 | 7 |
Subtract the numbers in the ten thousands column from the top number:
8-8=0
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 0 | 2 | 2 | 8 | 7 |
Subtract the numbers in the hundred thousands column from the top number:
3-1=2
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 2 | 0 | 2 | 2 | 8 | 7 |
Write 3 in the millions place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| 6 | 10 | ||||||
| 0 | 12 | ||||||
| 3 | 3 | 8 | 4 | 7 | 1 | 2 | |
| - | 1 | 8 | 2 | 4 | 2 | 5 | |
| 3 | 2 | 0 | 2 | 2 | 8 | 7 |
The solution is: 3,202,287
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