Fangfang’s balcony has 28 small tiles in one row and 20 small tiles in one vertical row. She plans to paste some small tiles of different designs and colors, which are 3 tiles long and 2 tiles wide. How many different kinds are there Post method?
方方家的阳台一横行贴了28块小瓷砖，一竖行贴了20块小瓷砖，她打算在这上面贴一些长占3块，宽占2块的花色小瓷砖，有多少种不同的贴法？
<gadget id="calculator">28 - 2</gadget>
<output>26</output>

<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">26 * 19</gadget>
<output>494</output>

<gadget id="calculator">20 - 2</gadget>
<output>18</output>

<gadget id="calculator">28 - 1</gadget>
<output>27</output>

<gadget id="calculator">18 * 27</gadget>
<output>486</output>

<gadget id="calculator">494 + 486</gadget>
<output>980</output>

<result>980</result>