Step 1: Multiply the ones by 3.

1 ones  ×  3
=  3 ones

Step 2: Multiply the tens by 3.

3 tens  ×  3
=  9 tens

Step 3: Multiply the hundreds by 3.

2 hundreds  ×  3
=  6 hundreds

So, the product of 231 and 3 is 693.

Step 1a: Multiply the ones by 3.

5 ones  ×  3  =  15 ones

Step 1b: Regroup the ones.

15 ones  =  1 ten 5 ones

Step 2a: Multiply the tens by 3.

3 tens  ×  3  =  9 tens

Add the tens.
9 tens  +  1 ten  =  10 tens

Step 2b: Regroup the tens.

10 tens  =  1 hundred 0 tens

Step 3: Multiply the hundreds by 3.

1 hundred  ×  3  =  3 hundreds

Add the hundreds.
3 hundreds  +  1 hundred  =  4 hundreds

Step 1a: Multiply the ones by 2.

7 ones  ×  2  =  14 ones

Step 1b: Regroup the ones.

14 ones  =  1 ten 4 ones

Step 2a: Multiply the tens by 2.

7 tens  ×  2  =  14 tens

Add the tens.
14 tens  +  1 ten  =  15 tens

Step 2b: Regroup the tens.

15 tens  =  1 hundred 5 tens

Step 3a: Multiply the hundreds by 2.

8 hundreds  ×  2
=  16 hundreds

Add the hundreds.
16 hundreds  +  1 hundred
=  17 hundreds

Step 3b: Regroup the hundreds.

17 hundreds
=  1 thousand 7 hundreds