ng add @angular/material

import { CommonModule } from '@angular/common'; 
import { NgModule } from '@angular/core'; 
import { FormsModule } from '@angular/forms'; 
import { MatGridListModule } from '@angular/material'; 
    
import { AppComponent } from './example.component'; 
    
@NgModule({ 
  declarations: [AppComponent], 
  exports: [AppComponent], 
  imports: [ 
    CommonModule, 
    FormsModule, 
    MatGridListModule
  
  ], 
}) 
export class AppModule {}

<mat-grid-list cols="3" rowHeight="2:1">
    
  <mat-grid-tile>First Grid</mat-grid-tile>
  <mat-grid-tile>Second Grid</mat-grid-tile>
  <mat-grid-tile>Third Grid</mat-grid-tile>
  <mat-grid-tile>Fourth Grid</mat-grid-tile>
  <mat-grid-tile>Fifth Grid</mat-grid-tile>
  <mat-grid-tile>Sixth Frid</mat-grid-tile>
  
</mat-grid-list>

mat-grid-tile {
  background: lightsalmon;
}