<mat-grid-list cols="12" rowHeight="200px">
    <mat-grid-tile colspan="3" rowspan="1">Text</mat-grid-tile>
    <mat-grid-tile colspan="3" rowspan="1">Text</mat-grid-tile>
    <mat-grid-tile colspan="3" rowspan="1">Text</mat-grid-tile>
    <mat-grid-tile colspan="3" rowspan="1">Text</mat-grid-tile>
</mat-grid-list>