.factory {
  display: grid;
  grid-template-columns: 1fr 1fr 2fr;
  height: 600px;
  gap: 10px;
  margin-top: 100px;
  padding: 10px;
}

.factory>div {
  background-color: gray;
  border: 1px green solid;
}

.image-1 {
  width: 100%;
  height: auto;
}

/*.div-3 {
  grid-column: 3 / span 5;
}*/

.div-5 {
  grid-column: 1 / span 2;
}

<div >
  <div >box1</div>
  <div >box2</div>
  <div >box3</div>
  <div >box5</div>
  <div >box6</div>
</div>