JavaScript: get group that contains item in a grouped array

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const originalArray = [1, 2, 3, 4, 5, 6, 7, 8, 9];
const groupedArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];
 
// Assuming you want to find the group for the element 4 from the original array
const elementToFind = 4;
 
// Find the index of the element in the original array
const elementIndex = originalArray.indexOf(elementToFind);
 
// Calculate the corresponding group index
const groupIndex = Math.floor(elementIndex / 3);
 
// Get the corresponding group from the grouped array
const correspondingGroup = groupedArray[groupIndex];
 
console.log("Original Array:", originalArray);
console.log("Grouped Array:", groupedArray);
console.log(`Corresponding Group for ${elementToFind}:`, correspondingGroup);
Programming Language: ECMAScript