Lin Lin scaled up a photo of herself that was 6 cm long and 4 cm wide. The length of the enlarged photo was 13.5 cm and the width in centimeters.
林林将自己的一张长是6厘米，宽4厘米的照片按比例放大，放大后照片的长是13.5厘米，宽是多少厘米．
<gadget id="calculator">6 / 13.5</gadget>
<output>0.444444</output>

<gadget id="calculator">4 / 0.444444</gadget>
<output>9.000009</output>

<result>9.000009</result>