Access MultiDimensional Arrays With Indexes

Tell us what’s happening:
I guess I don’t understand this if arr[3] [[10,11, 12] then wouldn’t arr[2][0] equal the 789?

Your code so far

// Setup
var myArray = [[1,2,3], [4,5,6], [7,8,9], [[10,11,12], 13, 14]];

// Only change code below this line.
var myData =[[1,2,3], [4,5,6], [7,8,9], [[10,11,12], 13, 14]];
arr[1];

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Link to the challenge:
https://www.freecodecamp.org/challenges/access-multidimensional-arrays-with-indexes

with this data

var myData =[[1,2,3], [4,5,6], [7,8,9], [[10,11,12], 13, 14]];

myData[3] would be [[10, 11, 12], 13, 14]

myData[2] would be [7, 8, 9]

myData[2][0] would be 7