The four bears ate one watermelon, the first bear ate 3/5 of the watermelon; Do you know what fraction of the whole watermelon Xiong Si ate?
四只熊吃一个西瓜，熊一吃了西瓜的(3/5)；熊二吃了剩下的西瓜的一半；熊三和熊四平分着吃了熊一和熊二吃剩下的．你知道熊四吃了整个西瓜的几分之几吗？
<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)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (3/5) - (1/5)</gadget>
<output>1/5 = around 0.2</output>

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

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