3.14⋅12

Multiply 2 by 4. Place the result in the next column in the result line. There is one result line for each digit in 12.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

8 |

Multiply 2 by 1. Place the result in the next column in the result line. There is one result line for each digit in 12.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

2 | 8 |

Multiply 2 by 3. Place the result in the next column in the result line. There is one result line for each digit in 12.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 |

Multiply 1 by 4. Place the result in the next column in the result line. There is one result line for each digit in 12.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

4 |

Multiply 1 by 1. Place the result in the next column in the result line. There is one result line for each digit in 12.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

1 | 4 |

Multiply 1 by 3. Place the result in the next column in the result line. There is one result line for each digit in 12.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

3 | 1 | 4 |

Add the numbers in each column. In this case, add 8+0, then place the 8 in the result line.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

3 | 1 | 4 | |

8 |

Add the numbers in each column. In this case, add 2+4, then place the 6 in the result line.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

3 | 1 | 4 | |

6 | 8 |

Add the numbers in each column. In this case, add 6+1, then place the 7 in the result line.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

3 | 1 | 4 | |

7 | 6 | 8 |

Add the numbers in each column. In this case, add 0+3, then place the 3 in the result line.

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

3 | 1 | 4 | |

3 | 7 | 6 | 8 |

3 | .1 | 4 | |

⨯ | 1 | 2 | |

6 | 2 | 8 | |

3 | 1 | 4 | |

3 | 7 | 6 | 8 |

To find the number of decimal places needed in the answer, add the number of decimal places in the multiplier and multiplicand. In this case, there is a total of 2, so the answer must have 2 decimal places as well.

37.68

Multiply 3.14*12