Mom bought a fish from the supermarket. The mass of this fish is equal to (2/3) plus (2/3) kilograms of its own mass. How many kilograms does this fish weigh?
妈妈从超市买来一条鱼，这条鱼的质量等于它自身质量的(2/3)加(2/3)千克，这条鱼重多少千克．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

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

<result>2</result>