The number of adults visiting the Science and Technology Museum is twice the number of children. If there are 458 adults, how many people will visit the Science and Technology Museum?
参观科技馆的成人人数是儿童人数的2倍，如果有大人458人，一共有多少人参观科技馆？
<gadget id="calculator">458 / 2</gadget>
<output>229</output>

<gadget id="calculator">229 + 458</gadget>
<output>687</output>

<result>687</result>