A fruit shop brings in two baskets of fruit, and basket A is 30kg more than basket B. Basket B sells 18 kg, and the quality of the remaining fruit is exactly that of Basket A (2/5). How much is the original fruit in basket B?
水果店运来来两筐水果，甲筐比乙筐多30千克．乙筐卖出18千克，剩下的水果的质量正好是甲筐的(2/5)．乙筐原有水果多少千克？
<gadget id="calculator">30 + 18</gadget>
<output>48</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">48 / (3/5)</gadget>
<output>80</output>

<gadget id="calculator">80 - 30</gadget>
<output>50</output>

<result>50</result>