There was a big watermelon, Bajie ate it (3/5), the remaining watermelon Drifting ate half, and Tang Seng and Wukong shared the other half equally. What fraction of the whole watermelon did Goku eat?
有一个大西瓜，八戒吃了(3/5)，剩下的西瓜沙僧吃了一半，另一半唐僧和悟空平均分着吃了．悟空吃了整个西瓜的几分之几？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<result>1/10 = around 0.1</result>