#### Answer

10084

#### Work Step by Step

Start by multiplying in the ones column. 4 * 1 = 4 ones
2 5 2 1
x 4
4
write 4 ones in the ones column.
Next, multiply 4 times 2 tens.
4 * 2 tens = 8 tens
2 5 2 1
x 4
8 4
write 8 tens in the tens column.
Next, multiply 4 times 5 hundreds.
4 * 5 hundreds = 20 hundreds
2
2 5 2 1
x 4
0 8 4
Write 2 thousands in the thousand’s column, write 0 hundred’s in the hundred’s column.
Next, multiply 4 times 2 thousands.
4 * 2 thousands = 8 thousands.
Add the 2 thousands that was written at the top of the thousand’s column.
8 thousands + 2 thousands = 10 thousands
2
2 5 2 1
x 4
1 0 0 8 4