问题
I'm trying to make a layout like the picture below but I don't know how to specify the column to make it be like a part of it 3/4 the column and the other part is 1/4, I'm trying to use flexbox
This what I want the layout looks like:
I don't know how to make what I'm saying up there :D as am still new to flexbox.
but down below my attempt to create this thing, but i couldn't make the first column consists of two unequal rows.
.container {
  display: grid;
  width: 100%;
  height: 45vw;
  margin: auto;
  gap: 25px;
  border: 2px solid red;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  grid-template-areas:
    "cmd  grph grph grph  " 
    "write grph grph grph";
}
.box {
  display: flex;
  /*flex-direction: row;*/
  align-items: center;
  justify-content: center;
  border: 5px solid black;
}
.dot {
  height: 50px;
  width: 50px;
  background-color: blueviolet;
  border-radius: 50%;
}
.command {
  grid-area: cmd;
}
#grph {
  grid-area: grph;
}
#write {
  grid-area: write;
}<div class="container">
  <div class="command box"></div>
  <div id="grph" class="box"></div>
  <div id="write" class="box"></div>
</div>回答1:
This is your code:
.container {
   display: grid;
   grid-template-rows: repeat(2,fr);
}
If you want two grid areas split 3/4 and 1/4, then why use two rows? Use four rows instead.
Grid
.container {
  display: grid;
  height: 45vw;
  gap: 25px;
  border: 2px solid red;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(4, 1fr);
  grid-template-areas:
    "cmd  grph grph grph  "
    "cmd  grph grph grph  "
    "cmd  grph grph grph  "    
    "write grph grph grph";
}
.command  { grid-area: cmd; }
#grph     { grid-area: grph;  }
#write    { grid-area: write; }
.box      { border: 5px solid black; }<div class="container" id="cmd">
  <div class="command box"></div>
  <div id="grph" class="box"></div>
  <div id="write" class="box"></div>
</div>Flex
Here's the flexbox solution:
.container {
  display: flex;
  flex-flow: column wrap;
  height: 45vw;
  border: 2px solid red;
}
.command {
  flex: 3;
  margin-bottom: 25px;
}
#grph {
  flex-basis: 100%;
  order: 1;
  margin-left: 25px;
}
#write {
  flex: 1;
}
.box {
  border: 5px solid black;
}<div class="container" id="cmd">
  <div class="command box"></div>
  <div id="grph" class="box"></div>
  <div id="write" class="box"></div>
</div>回答2:
first of all give class name different of
 class="box1"
after that change its property 
box1{
height:40vh
}
box2{
height: 20vh}
来源:https://stackoverflow.com/questions/62348117/unequal-row-heights-in-a-flex-column