3 kg of mung beans can make 1 kg of vermicelli. According to this calculation, how many kilograms of mung beans are needed to make 15.9 kilograms of vermicelli?
3千克绿豆可以制1千克粉丝．照这样计算，要制15.9千克粉丝，需要绿豆多少千克？
<gadget id="calculator">15.9 * 3</gadget>
<output>47.7</output>

<result>47.7</result>