The weight of a black bear is 320 kg. At present, the weight will increase by 15%, and the weight will decrease by 20% after hibernation. How much is the weight of a black bear after hibernation?
黑熊体重320千克，在当前，体重会增加15%，冬眠后的体重下降20%，黑熊冬眠后的体重是多少千克？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">320 * (23/20) * (4/5)</gadget>
<output>1_472/5 = around 294.4</output>

<result>1_472/5 = around 294.4</result>