**Objective**: Given a number n and k, Calculate n / k^{2} without using pow() or / operator.

**Example**:

N = 48, k = 4 N/k^{2}= 3

**Approach**: Bit Manipulation

- Right shift the number N by k.
- N = 48
- Bit representation: 0 1 1 0 0 0 0
- Right shift by k = 4
- 0 1 1 which is the representation of 3.

**Java Code**:

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public class MultiplyByPowerOf2 { | |

// Left shift the number n by k. | |

public static void multiply(int n, int k){ | |

System.out.print("Number " + n + " Multiplied by 2^" + k +" is: "); | |

System.out.println(n<<k); | |

} | |

public static void main(String[] args) { | |

int n = 3; | |

int k = 4; | |

multiply(n,k); | |

} | |

} |

**Output**:

Number 48 Divided by 2^4 is: 3

Read about –

- Left and Right shift operators.
- Multiply with power of 2 without using pow() or * operator