How to fix if and else if statements not choosing the right statement

Im doing a Box calculator that takes the input of the length width and height and then calculates it and compares the two and says something like "The first box is slightly bigger then the next one" vice versa. The issue is I have multiple statements that say if the box is double triple quadruple the size but it just sees that box one is greater then box two and display it.

I have tried all if statements dividing the box or multiplying

public void calculateSizes() {
    firstBox.calcVolume();
    secondBox.calcVolume();

    if (firstBox.calcVolume() == secondBox.calcVolume()) {   //Calculate the size difference and display the corresponding message
        message = ("The first box is the same size as the second box");
    }else if (firstBox.calcVolume() > secondBox.calcVolume() ) {
        message = ("The first box is slightly bigger than the second box");

    }else if (secondBox.calcVolume() > firstBox.calcVolume()) {
        message = ("The second box is slightly bigger than the first box");

    }else if (firstBox.calcVolume() >= secondBox.calcVolume() / 2) {
        message = ("The first box is twice the size than the second box");

    }else if (secondBox.calcVolume() >= firstBox.calcVolume() / 2) {
        message = ("The second box is twice the size than the first box");

    }else if (firstBox.calcVolume() >= secondBox.calcVolume() / 3) {
        message = ("The first box is triple the size than the second box");

    }else if (secondBox.calcVolume() >= firstBox.calcVolume() / 3) {
        message = ("The second box is triple the size than the first box");

    }else if (firstBox.calcVolume() >= secondBox.calcVolume() / 4) {
        message = ("The first box is quadruple the size than the second box");

    }else if (secondBox.calcVolume() >= firstBox.calcVolume() / 4) {
        message = ("The second box is quadruple the size than the first box");

    }else if (firstBox.calcVolume() == firstBox.calcVolume() / secondBox.calcVolume()) {
        message =("\n Box one is " + firstBox.calcVolume() / secondBox.calcVolume() + " times the size second box" );

    }else if (secondBox.calcVolume() == secondBox.calcVolume() / firstBox.calcVolume()) {  
        message =("\n Box two is " + secondBox.calcVolume() / firstBox.calcVolume() + " times the size first box");
    }
}