Black bear Pipi bought a bucket of honey, ate (2/5) on the first day, and 5 kilograms on the second day, leaving half of it. How many kilograms does this barrel of honey originally weigh?
黑熊皮皮买来一桶蜂蜜，第一天吃掉(2/5)，第二天吃掉5千克，还剩一半．这桶蜂蜜原来有多少千克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">5 / (1/10)</gadget>
<output>50</output>

<result>50</result>