Ganmaoling granules produced by a pharmaceutical factory contain 10 bags in a box, and each bag contains 0.2g of "acetaminophen". How many grams of "acetaminophen" are contained in two boxes of Ganmaoling Granules?
某药厂生产的感冒灵颗粒，一盒内装10袋，每袋含"对乙酰氨基酚"0.2g．两盒感冒灵颗粒含"对乙酰氨基酚"多少克？
<gadget id="calculator">0.2 * 10 * 2</gadget>
<output>4</output>

<result>4</result>