Enlarge a rectangular photo with a length of 6 cm and a width of 4 cm. The length of the enlarged photo is 15 cm and its width in cm.
把一张长是6厘米，宽是4厘米的长方形照片放大，放大后的长是15厘米，宽是多少厘米．
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">15 / (3/2)</gadget>
<output>10</output>

<result>10</result>