After the fruit shop sells the original fruit (2/5), it buys another 120 kilograms. Now the fruit is less than the original one (4/15). How many kilograms of the original fruit?
水果店将原有水果卖出(2/5)后，又购进120千克，现在的水果比原来还少(4/15)，原有水果多少千克？
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

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

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (4/15) - (3/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">120 / (2/15)</gadget>
<output>900</output>

<result>900</result>