Cup A and Cup B are both cylindrical, the bottom area of Cup A is 28cm**2, and the bottom area of Cup B is 32cm**2. Pour the same volume of water into cup A and cup B respectively. If the height of water in cup A is 12 cm, what is the height of water in cup B? (Solved by two methods, one of which is the proportional method)
A杯和B杯都是圆柱形的，A杯里面的底面积是28cm**2，B杯里面的底面积是32cm**2．将同样体积的水分别倒入A杯和B杯．如果A杯里水的高度是12cm，那么B杯里水的高度是多少厘米？(用两种方法解，其中一种是比例方法)
<gadget id="calculator">12 / 32</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">28 * (3/8)</gadget>
<output>21/2 = around 10.5</output>

<result>21/2 = around 10.5</result>