The weight ratio of silver and aluminum in a metal alloy is 5:6. There are 480 kilograms of aluminum, how many kilograms of silver need to be added to make this alloy? (Solution with proportional thinking)
一种金属合金中银和铝的重量比是5：6．现有480千克铝，需要加多少千克的银，才可以制成这种合金？(用比例思路解)
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) * 480</gadget>
<output>400</output>

<result>400</result>