human
Solve length problems involving similar shapes where the missing length is the shorter one Rectangle \( \mathrm{P} \) has been enlarged by a scale factor of \( 1.5 \) to give rectangle \( \mathrm{Q} \).

What length should replace the star? ![Two rectangles, the smaller labelled P and the larger labelled Q. Q has width 9cm and length 12cm. The length of P is marked with a star.]() \( 10.5 \mathrm{~cm} \)
gpt
Subtracted rather than divided by a scale factor