Mom bought a watermelon weighing 4kg. Dad ate (3/8) of the watermelon, and Xiaohong ate (2/3) of the watermelon. How much of the watermelon did Xiaohong eat?
妈妈买了一个西瓜重4kg，爸爸吃了这个西瓜的(3/8)，小红吃的是爸爸的(2/3)，小红吃了这个西瓜的多少．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/8) * (2/3)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>