There are 4 different Chinese books, 5 math books, 3 English books, and 2 nature books. Choose one from each, how many different methods are there?
有不同的语文书4本，数学书5本，英语书3本，自然书2本．从中各任取一本，共有多少种不同的取法．
<gadget id="calculator">4 * 5 * 3 * 2</gadget>
<output>120</output>

<result>120</result>