The price of each cup is 9 jiao, 8 jiao, 6 jiao, 4 jiao and 3 jiao, and the price of each tea tray is 7 jiao, 5 jiao and 2 jiao. If a teacup is paired with a tea tray, how many kinds of tea sets with different prices can be made?
每个茶杯的价格分别是9角、8角、6角、4角和3角，每个茶盘的价格分别是7角、5角和2角．如果一个茶杯配一个茶盘，一共可以配成多少种不同价格的茶具．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">15 - 5</gadget>
<output>10</output>

<result>10</result>