Number A * Number B = 800, if Number A is multiplied by 2 and Number B remains unchanged, what is the product?
甲数*乙数=800，如果甲数乘2，乙数不变，那么积是多少．
<gadget id="calculator">800 * 2</gadget>
<output>1_600</output>

<result>1_600</result>