Given this Deployment YAML snippet, what will be the number of pods running after applying it?

Given this Deployment YAML snippet, what will be the number of pods running after applying it?

apiVersion: apps/v1
kind: Deployment
metadata:
  name: test-deploy
spec:
  replicas: 3
  selector:
    matchLabels:
      app: test
  template:
    metadata:
      labels:
        app: test
    spec:
      containers:
      - name: nginx
        image: nginx:latest