Two families, A and B, jointly buy a box of fruit. A and A share (2/5) more 3 kilograms of this box of fruit, and B’s family divides half of this box of fruit. How many kilograms of this box of fruit did they buy?
甲、乙两家人合买一箱水果，甲甲分了这箱水果的(2/5)还多3千克，乙家分了这箱水果的一半，问买的这箱水果共多少千克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">1 - (1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">3 / (1/10)</gadget>
<output>30</output>

<result>30</result>