How many significant figures are understood for the number in the following definition: 1 mil = 5280 ft

Significant figures are any non-zero digits or trapped zeros. They do not include leading or trailing zeros. When going between decimal and scientific notation, maintain the same number of significant figures.

Explanation:

Google says, and from what I remember and what google says, the significant figures would be, for 1 mil, 1 significant figure. for 5280 ft, 3 significant figures. basically, omit any zeros that aren't in the middle of the number.