A bag of rice weighs 50 kg, what is the weight of (4/5) bag of rice in kg?
一袋大米重50千克，(4/5)袋大米重多少千克．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 * (4/5)</gadget>
<output>40</output>

<result>40</result>