A bottle of "Zhenjiang Balsamic Vinegar" eats (1/2) kilograms, just eats (4/5) how many kilograms does this bottle of vinegar have? How many.
一瓶"镇江香醋"吃去(1/2)千克，刚好吃去(4/5)这瓶醋原有多少千克？多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/2) / (4/5)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>