Grandma bought three kinds of vegetables in the morning, among which green vegetables (4/5) kilograms are less than radishes (1/2) kilograms, and cabbages are more than radishes (1/4). How many kilograms more cabbage than radish?
奶奶早晨买来三种蔬菜，其中青菜(4/5)千克，比萝卜少(1/2)千克，白菜比萝卜多(1/4)．白菜比萝卜多多少千克？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/5) + (1/2)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(13/10) * (1/4)</gadget>
<output>13/40 = around 0.325</output>

<result>13/40 = around 0.325</result>