A kind of brass is composed of copper and zinc. The ratio of copper to zinc is 5:3. There are 450 grams of copper and 240 grams of zinc. How many grams of this kind of brass can be made?
一种黄铜，由铜和锌组成，其中铜和锌的比为5：3，现有铜450克，锌240克，最多可以制成多少克这样的黄铜？
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 * 5</gadget>
<output>400</output>

<gadget id="calculator">240 + 400</gadget>
<output>640</output>

<result>640</result>