The fruit shop shipped 180 kilograms of fruit, sold in the morning (4/9) and sold in the afternoon (1/3), how much more kilograms were sold in the morning than in the afternoon?
水果店运来水果180千克，上午卖出(4/9)，下午卖出(1/3)，上午比下午多卖多少千克？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(4/9) - (1/3)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">180 * (1/9)</gadget>
<output>20</output>

<result>20</result>