Explanation :
Move the top matchstick of the square horizontally to the left corner.
Next, take the right-side matchstick of the square and shift it vertically to the bottom.
This will create a plus sign, and the fire will move outside the box.
Matchstick Image : move-2-matchstick-to-have-thi-fire-outside-another-sqaure-answer-2
Matchstick Image : move-2-matchstick-to-have-thi-fire-outside-another-sqaure-answer-3