In each of the following number series, a wrong number is given. Find out the wrong number. $2 \quad 3 \quad 6 \quad 18 \quad 109 \quad 1944 \quad 209952$

Pattern: 2×1.5=3, 3×2=6, 6×3=18, 18×4.5=81, 81×6=486, 486×7.5=3645, 3645×9=32805. The multiplier increases by 0.5, then 1, then 1.5, then 1.5, then 1.5... Wait, let me verify: 2×1.5=3, 3×2=6, 6×3=18, 18×6=108 (not 109), 108×18=1944, 1944×108=209952. The pattern is: multiply by 1.5, 2, 3, 6, 18, 108 (each multiplier is previous multiplier × something). 109 breaks the pattern.