Sample code:

Lightning Web Component:

HTML:

<template>
    <lightning-card>
        Contact Name is {name}<br/><br/>
        Contact Phone Number is {phone}
    </lightning-card>
</template>

JavaScript:

import { LightningElement, wire, api } from 'lwc';
import { ShowToastEvent } from 'lightning/platformShowToastEvent';
import { getRecord } from 'lightning/uiRecordApi';
import SystemModstamp from '@salesforce/schema/Account.SystemModstamp';

const FIELDS = ['Contact.Name', 'Contact.Phone'];

export default class GetRecordLwc extends LightningElement {

    @api recordId;
    contact;
    name;
    phone;

    @wire( getRecord, { recordId: '$recordId', fields: FIELDS } )
    wiredRecord({ error, data }) {

        if ( error ) {

            let message = 'Unknown error';
            if (Array.isArray(error.body)) {
                message = error.body.map(e => e.message).join(', ');
            } else if (typeof error.body.message === 'string') {
                message = error.body.message;
            }
            this.dispatchEvent(
                new ShowToastEvent({
                    title: 'Error loading contact',
                    message,
                    variant: 'error',
                }),
            );

        } else if ( data ) {

            this.contact = data;
            console.log( 'Contact is ' + JSON.stringify( this.contact ) );
            this.name = this.contact.fields.Name.value;
            this.phone = this.contact.fields.Phone.value;

        }
    }

}

JavaScript-meta.xml:

<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>50.0</apiVersion>
    <isExposed>true</isExposed>  
    <targets>  
        <target>lightning__RecordPage</target>  
    </targets>  
</LightningComponentBundle>

Output: