The number of adults visiting the Science and Technology Museum is twice that of children, and there are 152 children visiting the Science and Technology Museum. How many people visited the Science and Technology Museum in total?
参观科技馆的成人人数是儿童的2倍，参观的儿童有152人，一共有多少人参观科技馆？
<gadget id="calculator">152 * 2</gadget>
<output>304</output>

<gadget id="calculator">304 + 152</gadget>
<output>456</output>

<result>456</result>