Mingming practiced typing, each page has 20 lines, each line has 36 characters, obviously typed 5 pages, how many words were typed in total?
明明练习打字，每页的字有20行，每行有36个字，明明打了5页，一共打了多少个字？
<gadget id="calculator">20 * 36</gadget>
<output>720</output>

<gadget id="calculator">720 * 5</gadget>
<output>3_600</output>

<result>3_600</result>