<div class="contain-test">
  <div class="test">Check</div>
</div>
<div class="container">
  <div class="item first">First</div>
  <div class="item second">Second</div>
  <div class="item third">Third</div>
  <div class="item fourth">Fourth</div>
</div>

.container, .contain-test {
    color: pink;
    width: 500px;
    height: 60px;
}
  
.container {
    background: coral;
    display: flex;
}
  
.item {
    width: 100px;
    height: 60px;
}
  
.test {
    background: black;
    height: 60px;
    width: 100px;
}
  
.first {
    background: blue;
}
  
.second {
    background: purple;
}
  
.third {
    background: brown;
}
  
.fourth {
    background: red;
}