The department store shipped 15 packs of towels, each pack of 20, each priced at 4 yuan. How much do these towels cost in total?
百货店运来15包毛巾，每包20条，每条售价4元．这些毛巾一共售价多少元？
<gadget id="calculator">15 * 20 * 4</gadget>
<output>1_200</output>

<result>1_200</result>