.box{
 width: 100vw;
 height: 100vh;
display: flex;
justify-content: space-between;
flex-wrap:  wrap ;
}
.box> div{
   width: 33%;
    height: 33%;
  
    margin: 0;
    padding: 0;
    display: flex;
}

img{
    width: 100%;
    height: 300px;
    object-fit: cover;
}