<div class="cell-main">
  <div class="cell-left">
    testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttestte
  </div>
  <div class="cell-right">
    test
  </div>
  <div class="cell-bottom">
    <div class="cell-left">
      test
    </div>
    <div class="cell-right">
      test
    </div>
    <div class="cell-bottom">

      <div class="cell-left">
        test
      </div>
      <div class="cell-right">
        test
      </div>

    </div>
  </div>
</div>

*{
    box-sizing: border-box;
}
div{
  border: 1px solid black;
}

.cell-left {
    height: 100%;
    padding: 5px;
    width: 50%;
    float: left;
    text-align:left
}

.cell-right {
    height: 100%;
    padding: 5px;
    width: 50%;

    float: left;
    text-align:right
}

.cell-bottom {
    height: 100%;
    padding: 5px;
    width: 94%;
    margin-left: 3%;
    float: left;
}

.cell-main {
    height: 100%;
    padding: 5px;
    width: 100%;
    float:left;
}

/* Keyword values */
overflow-wrap: normal;
overflow-wrap: break-word;

/* Global values */
overflow-wrap: inherit;
overflow-wrap: initial;
overflow-wrap: unset;