A pile of apples, first take away (1/8) of the pile of apples, and then take away (1/2) of the pile of apples, how much of the pile of apples are taken twice
一堆苹果，先拿走这堆苹果的(1/8)，再拿走这堆苹果(1/2)，两次共拿走这堆苹果的多少
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">(1/8) + (1/2)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>