Fire
Fire/Flying weaknesses
Fire/Flying is weak to Rock, Water and Electric, and takes 4× from Rock.
When Fire/Flying Pokémon are hit
4×Hits hardest
2×Super effective
½×Not very effective
¼×Barely scratches it
0×No effect
Its two types separately
Multiply the two to get the result. For example, Rock deals 2× × 2× = 4×.