#mainbody406 {
    display: flex;
    justify-content: center;
    flex-grow: 1;
    flex-direction: column;
    min-height: calc(900vh/10.80);
    min-width: calc(1400vw/19.20);
    height: calc(900vh/10.80);
    width: calc(900vw/19.20);
}