There are 5 different story books and 3 different history books on the bookshelf. How many different ways are there to take two different books from the bookshelf at random?
书架上有5本不同的故事书，3本不同的历史书，任意从书架上取两本不同的书，有多少种不同的取法？
<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">56 / 2</gadget>
<output>28</output>

<result>28</result>