Cannot fit requested classes in a single dex file (# methods: 74766 > 65536) code example

Example 1: Cannot fit requested classes in a single dex file (# methods: 65710 > 65536)

android {
    defaultConfig {
        ...
        minSdkVersion 21 <----- *here
        targetSdkVersion 26
        multiDexEnabled true <------ *here
    }
    ...
}

Example 2: D8: Cannot fit requested classes in a single dex file (# methods: 92159 > 65536) com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: The number of method references in a .dex file cannot exceed 64K.

defaultConfig {
    ...

    multiDexEnabled true
}