.gallery {
margin:0 40px;
display:grid;
grid-template-columns:30% 30% 30%;
grid-template-rows:30% 30%;
grid-template-areas:
"a1 a2 a3"
"a4 a5 a6";
gap:10px;
}

.gallery .photo1 {
grid-area:a1;
}
.gallery .photo2 {
grid-area:a2;
}
.gallery .photo3 {
grid-area:a3;
}
.gallery .photo4 {
grid-area:a4;
}
.gallery .photo5 {
grid-area:a5;
}
.gallery .photo6 {
grid-area:a6;
}

.gallery figure{
margin:0;
padding:0;
}
.gallery img {
width:100%;
height:100%;
object-fit:cover;
aspect-ratio:auto;
}
.gallery figcaption{
display:inline;
position:relative;
top:-20px;
left:5px;
padding:5px;
background:#fff;
font-size:62.5%;
border-radius:5px;
}