There are two baskets of fruit, A and B. The weight of the fruit in the A basket is 90 kg. The weight of the fruit in the A basket is 1/3, and that of the B basket is 1/4. The remaining weight of the two baskets is the same.
甲、乙两筐水果，甲筐水果重90千克，甲筐用去(1/3)，乙筐用去(1/4)，两筐剩下的质量一样重，乙筐水果重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(2/3) / (3/4)</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">90 * (8/9)</gadget>
<output>80</output>

<result>80</result>