The prices of each pencil are 2 jiao, 5 jiao, 9 jiao and 2 yuan respectively, and the prices of each eraser are 3 jiao, 5 jiao and 1 yuan respectively. If you buy 1 pencil and 1 eraser, how many different prices can you buy?
每支铅笔的价格分别为2角、5角、9角和2元，每块橡皮的价格分别为3角、5角和1元．如果买1支铅笔和1块橡皮，可以有几种不同价格的买法？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>