Tofu shop 20 bags of soybeans, each bag 40 kg. 1 kg of soybeans is used to make 4 kg of tofu. How many kilograms of tofu can be made from these soybeans?
豆腐店20袋黄豆，每袋40千克．1千克黄豆做4千克豆腐．这些黄豆能做多少千克豆腐．
<gadget id="calculator">40 * 20 * 4</gadget>
<output>3_200</output>

<result>3_200</result>